SECTION 5 CAR CLASSES

The car classes are divided into six general categories: Special Construction, Vintage, Classic, Modified, Production and Diesel Truck. The general rules for each category apply to all classes in that category.

It is the responsibility of the competitor to make sure their race vehicle(s) meets all safety and class requirements before competing at Lake Gairdner, El Mirage, Muroc or Bonneville!

• Special Construction
• Vintage
• Classic
• Modified
• Production
• Diesel

The general rules for each category apply to all classes in that category.

Engine Class Breaks

5.A SPECIAL CONSTRUCTION CATEGORY

This category is the pinnacle of the straightaway racer’s art. It contains three main groups. In the automobile group are the unlimited Streamliners and open-wheeled Lakesters with a 4+ wheel configuration and in the motorcycle group are the Streamliner and Streamliner Sidecar classes. These classes allow both blown and un-blown, gas or fuel engines. These are all-out straightaway vehicles with non-stock engine blocks allowed, (with the exception of specific Vintage engine classes).  Innovation is encouraged, within the rules.  Modified production bodies are forbidden. Four-wheel drive is allowed in the automotive group only.
Vehicles in this category must have fire doors or panels in the body, clearly marked to allow access to the engine compartment and chassis. The fire doors/panels must have a minimum diameter of 4 inches.
It is strongly recommended that all new vehicles be submitted for a pre-event inspection by appointment with the Technical Committee. If not practical because of distance, photographs and drawings may be submitted to the Technical Committee Chairman, see contacts page.

5.A.1 Streamliner - /BFS, /FS, /BGS, /GS, /DS

This class is for the all-out land speed record car. Cars in this class must have at least four wheels, but they need not be arranged in a rectangular configuration. The design of the body is restricted only to the extent that at least two (2) wheels must be covered.

5.A.2 Lakester - /BFL, /FL, /BGL, /GL

Special cars constructed in such a way that there is no streamlining, fairing or covering of the wheels and tires. Tread width is optional, so long as no part of the body or axle fairing is wider than the narrowest inner vertical plane of the tires. Wing struts must be within the inner vertical plane of the rear tires. The wing must be mounted at least 12" above the top of the rear tire as measured from the lowest part of the wing. Front wings must be no wider than the inner vertical plane of the narrowest set of tires.

5.A.3 Electric Vehicle - /E
This class is for vehicles using electric power as the sole means of propulsion. The vehicles must be wheel driven, either front or rear. Four wheel drive is allowed. THE BODY CONFIGURATION IS UNLIMITED. The vehicle and driver must meet all technical and safety regulations based on the speed of the existing record. The class will be based on vehicle weight less driver. The entrant MUST provide an annual weight certificate for classification purposes.

5.A.4 Turbine Vehicle - /T
This class is for vehicles using turbine power (external combustion), as the sole means of propulsion. The vehicles must be wheel driven, either front or rear. Four wheel drive is allowed. THE BODY CONFIGURATION IS UNLIMITED. The vehicle and driver must meet all technical and safety regulations based on the speed of the existing record. The class will be based on vehicle weight less driver. The entrant MUST provide an annual weight certificate for classification purposes.

5.A.5 Steam Vehicle - /T
This class is for vehicles using steam power as the sole means of propulsion. The vehicle shall be wheel driven. THE BODY CONFIGURATION IS UNLIMITED. The vehicle and driver shall meet all technical and safety regulations based on the speed of the existing record. The class will be based on vehicle weight less driver. The entrant shall provide a current weight certificate for classification purposes.

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5.B VINTAGE

This category is specifically intended for the lovers of antique iron. Although fiberglass and aluminum bodies are allowed, the body shall be an exact replica of an American production automobile body except for the Vintage Oval Track class. No modification is allowed to the body proper from the stock firewall location back and the window down, and only limited modifications are allowed to the hood and top.
This category is organized into three groups: ROADSTERS, from the highly modified to the street roadster; VINTAGE COUPES AND SEDANS, which are special vintage classes for the Modified Category; and VINTAGE OVAL TRACK, a special class for oval track and speedway vehicles with pre-1948 designed engines.
Except for the Vintage Oval Track vehicles, only automobile bodies produced by an American manufacturer prior to 1948, at a rate of 500 or more yearly, or exact replicas of such bodies are allowed. Tops may be chopped, but no other alteration to the contour or size of the body shell is allowed except as specifically allowed in the class rules. Wheel wells may be filled but not deepened. Rear axles may be narrowed as long as no part of the tyres extends within the body shell. TURBOCHARGERS ARE NOT ALLOWED ON VINTAGE CLASS ENGINES COMPETING IN VINTAGE BODY CLASSES, see Section 2.A.1.
The minimum tread dimensions for all Vintage Category vehicles are 111.76 cm (44 in.) front and 127 cm (50 in.) rear. Modified Roadsters are exempt from the front tread requirement. The minimum wheel diameter for all Vintage Category vehicles with the exception of /VOT is 35.56 cm (14 in.).
Bodies shall be mounted in a conventional manner and all stock panels shall be mounted in their original relationship to each other. No fenders are allowed on MODIFIED, FUEL or GAS Roadsters. Firewalls may be altered, moved or replaced entirely.
All vehicles entered in the VINTAGE category, shall have all flammable interior items removed where possible. For example, all floor coverings (including firewall), headliner, door panels, side and rear trim / upholstery. Door and side panels shall be replaced with non-flammable replacement. For example, aluminum panels.

5.B.1 Modified Roadster - /BFMR, /FMR, /BGMR, /GMR, /BFRMR, /FRMR, /BGRMR, /GRMR

In addition to the general category requirements, cars in this class shall have an American production automobile roadster body or an exact replica of an American production automobile roadster body as produced between 1923 and 1938. The combined body area covered or altered by the headrest fairing, all parachute fairings, and any other allowed body protuberances or displacements, from the original cockpit opening to the rear of the car cannot exceed 65%, as measured in a horizontal plane from the top view.
Any type of frame may be used, and the engine may be set back 50% of the wheelbase. The driver’s seat may be at any location between the firewall and the rear axle centerline.
Streamlining ahead of and including the cowl and channeling (4.I.1) is permitted.  Air intakes (4.B), air vents (4.C) and the following as defined in Section 4.CC are allowed: Splitters (4.CC.1), Axle Fairing (4.CC.2), Belly Pan (4.CC.3), Headrest Fairing (4.CC.4), Skirts (4.CC.7), Strakes (4.CC9), and Wings (4.CC.12). No fairing or special covering of the wheels and tyres is permitted.
A rigid tonneau cover and headrest fairing are allowed as long as they do not violate the definition of an open car.
The body may be cut out to move the driver as far back as possible, as long as the driver remains seated forward of the rear axle centerline and behind the engine. Wheel wells may be filled at stock location, but the rear axle shall not be narrowed to the point that the inner vertical plane of the rear tyres is narrower than the original inner fender well. No alterations to the turtle deck are allowed. The body at the original windshield line may be re-contoured to a flatter configuration, so long as the body top contour is not lower than the top of the doors as measured at the front edge of the doors.
Headrest and parachute pack fairing are allowed as long as the fairing is no larger than the headrest or parachute pack and does not extend past the rear of the body shell. Push bars shall not be solid or offer any aerodynamic advantage.
Maximum wheelbase is 482.6 cm (190 in.) Allowable minimum tread widths are 127 cm (50 in.) rear and 96.52 cm (38 in.) front. Allowable body width across the bottom of the doors shall meet the dimension as originally produced by the manufacturer. The entrant shall provide this dimension.
Wings are allowed. The wing width, including side plates, shall not be wider than the inner vertical plane of the rear tyres. The maximum allowable height of the wing shall not exceed 165.1 cm (65 in.) from the ground as measured to the highest part of the wing. The rear of the wing, including side plates, may not be set back more than 45.72 cm (18 in.) behind the rear of the body.  The total wing area (measured by the fore to aft dimension times the side to side dimension, on the top surface) shall not exceed 7432.24 sq. cm. (1152 sq. in.) The lowest portion of the wing shall be at least 30.48 cm (12 in.) above the roll cage structure. Multiple element wings are NOT allowed. Spoilers and four-wheel drive systems are NOT allowed.
Minimum Wheelbase Requirements:

Engine classes allowed are: AA, A, B, C, D, E, F, G, H, XF, XO, XXF, XXO, V4 and V4F

5.B1.a Rear EnginedModified Roadster - /BFRMR, /FRMR, /BGRMR, /GRMR

In addition to the general category requirements, cars in this class shall have an American production automobile roadster body or an exact replica of an American production automobile roadster body as produced between 1923 and 1938. The combined body area covered or altered by the headrest fairing, all parachute fairings, and any other allowed body protuberances or displacements, from the original cockpit opening to the rear of the car cannot exceed 65%, as measured in a horizontal plane from the top view.
Any type of frame may be used, and the engine may be set back 50% of the wheelbase. The driver’s seat may be at any location between the firewall and the rear axle centerline.
Streamlining ahead of and including the cowl and channeling (4.I.1) is permitted.  Air intakes (4.B), air vents (4.C) and the following as defined in Section 4.CC are allowed: Splitters (4.CC.1), Axle Fairing (4.CC.2), Belly Pan (4.CC.3), Headrest Fairing (4.CC.4), Skirts (4.CC.7), Strakes (4.CC9), and Wings (4.CC.12). No fairing or special covering of the wheels and tyres is permitted.
A rigid tonneau cover and headrest fairing are allowed as long as they do not violate the definition of an open car.
The body may be cut out to move the driver as far back as possible, as long as the driver remains seated forward of the rear axle centerline and behind the engine. Wheel wells may be filled at stock location, but the rear axle shall not be narrowed to the point that the inner vertical plane of the rear tyres is narrower than the original inner fender well. No alterations to the turtle deck are allowed. The body at the original windshield line may be re-contoured to a flatter configuration, so long as the body top contour is not lower than the top of the doors as measured at the front edge of the doors.
Headrest and parachute pack fairing are allowed as long as the fairing is no larger than the headrest or parachute pack and does not extend past the rear of the body shell. Push bars shall not be solid or offer any aerodynamic advantage.
Maximum wheelbase is 482.6 cm (190 in.) Allowable minimum tread widths are 127 cm (50 in.) rear and 96.52 cm (38 in.) front. Allowable body width across the bottom of the doors shall meet the dimension as originally produced by the manufacturer. The entrant shall provide this dimension.
Wings are allowed. The wing width, including side plates, shall not be wider than the inner vertical plane of the rear tyres. The maximum allowable height of the wing shall not exceed 165.1 cm (65 in.) from the ground as measured to the highest part of the wing. The rear of the wing, including side plates, may not be set back more than 45.72 cm (18 in.) behind the rear of the body.  The total wing area (measured by the fore to aft dimension times the side to side dimension, on the top surface) shall not exceed 7432.24 sq. cm. (1152 sq. in.) The lowest portion of the wing shall be at least 30.48 cm (12 in.) above the roll cage structure. Multiple element wings are NOT allowed. Spoilers and four-wheel drive systems are NOT allowed.
Minimum Wheelbase Requirements:

Engine classes allowed are: AA, A, B, C, D, E, F, G, H, XF, XO, XXF, XXO, V4 and V4F

5.B2 Fuel - Gas Roadster - /BFR, /FR, BGR, GR

In addition to the general category requirements, cars in this class shall have an American production automobile roadster body or an exact replica of an American production roadster body as produced between 1928 and 1938. Any type frame may be used, and the body may be channeled to the bottom of the lower frame rail. Engines may be set back 25% of the wheelbase. Driver location is optional as long as the driver’s entire body is between the firewall and the rear axle centerline. Grille shells shall have a minimum of 3419.34 sq. cm. (530 sq. in.) of frontal area (‘28 Ford) and shall be mounted in the same vertical position as the original shell. The grille shell shall be measured at the widest point at the original shell and hood parting line. The height of the grille shell may be no higher than the cowl of the body as constructed. The grille shell width may not be altered but may be sectioned or bobbed. Grille shells of a design manufactured after 1932 may not be used on 1932 or earlier bodies. Tanks of any kind in front of the grille shell are specifically prohibited.
The body at the original windshield line may be re-contoured to a flatter configuration, so long as the body contour is not lower than the top of the doors and the distance between the bottom of the frame and body contour, measured at the original windshield line, is not less than 71.76 cm (28-1/4 in.). Flat panels may cover grille openings. Door hinges, windshield posts, filler caps, and brackets may be removed.
The configuration of the bodywork between the original windshield line and the grille shell is optional, as long as the overall length of the car, from the front of the grille shell to the rear of the body, with any grille shell, is no greater than 363.22 cm (143 in.) for all roadsters except 1933/34 roadsters, which are allowed 386.08 cm (152 in.). All other roadsters whose stock production length is longer than 363.22 cm (143 in.) shall be allowed their stock production length. The entrant shall provide this dimension.
Step pans (4. EE) are allowed, but belly pans (4. CC.3) or any other horizontal paneling not fitting the definition of floorboard is specifically forbidden. A flat panel may be located behind the grille shell and ahead of the vertical projection of the leading edge of the engine block. This panel shall not be lower than the frame at any point plus the thickness of the material used.
The following, defined as streamlining in Section 4, are allowed: Air Ducts (4. A), Air Intakes (4. B), Air Vents (4. C), Hood Scoops (4.R) and Headrest Fairing (4. CC.4). All other streamlining, as defined in Section 4. CC is NOT allowed.
A rigid tonneau cover and headrest fairing are allowed, as long as they do not violate the definition of an open car. The body may be cut to move the driver rearward, as long as the driver remains seated entirely forward of the rear axle centerline and behind the engine. The rear axle centerline may not be moved more than four inches aft from the stock position and rear tyres may not extend more than 25.4 mm (1 in.) beyond the rear most part of the body proper.
Minimum Wheelbase Requirements:

Engine classes allowed are: AA, A, B, C, D, E, F, G, H, XF, XO, XXF, XXO, V4 and V4F

5.B.2.a AMERICAN IRON ROADSTER – C/AIR (Gas only)

This is a single displacement engine class only. All rules which pertain to the existing Fuel/Gas Roadster class, 5.B.2, above, will be enforced in this class.
The engine used must be an American Automotive Production or Light Duty Pick Up Truck engines produced prior to 1973. The maximum engine displacement is 372.99 cid (6.111 L). The engine can be of a larger OEM displacement and reduced to the class maximum by reducing the bore and/or stroke. All engines in this class must run OEM iron blocks and cylinder heads. The block may be decked a maximum of .125”. Sectioning of the block is prohibited. Heads may be milled any amount, flat or angled. No welding or brazing modifications to block or heads allowed unless for repair. The burden of proof as to the origin of the engine components lies with the competitor. Induction can be either carburetors or mechanical fuel injection. Ignition must be a single points type magneto or points type distributor. No EFI, computer-controlled ignition or data collection computers are allowed (2.Q).

Engine class allowed: C

5.B.3 Street Roadster - /BSTR, /STR (Gas only)

In addition to the general category requirements, cars in this class shall have an American production automobile roadster body, or an exact replica of an American production automobile body produced between 1923 and 1938. The body shall not be altered in height, width or contour, and all stock panels, including cowl (4.MM), cowl eyebrow and windshield post mounting supports, see Section 4.BB, that are an integral part of the body, i.e., welded on or formed into the body sheet metal, shall be retained. Stock panels, correct for the body year used, shall be mounted in their original relationship to each other. On roadsters with non-removable windshield posts, the windshield structure may be cut off 25.4 mm (1 in.) above the lowest outer edge of the windshield frame. Replica panels shall be exact copies of stock panels in size and contour. Hood side panels, if used, are not required to have the stock louvers or doors but shall follow the original contour of the stock side panel. Hood side panels may be trimmed away for clearance of structural chassis or engine components. Bubbles or bulges may cover modifications made to the hood side panel to clear engine components so long as they do not violate the applicable portions of streamlining; Section 4.C.C. Rear fenders are required. The fenders may be bobbed to the bottom of the body, but may not be relocated, narrowed, or widened. The outer edge of a bobbed fender cannot be cut on a radius greater than the bottom of the original fender.
A radiator and or grille shell may be sectioned or bobbed, but the width may not be altered. If switched, the grille shell shall be of the same manufacturer as the body (e.g., Ford to Ford, Chevrolet to Chevrolet, etc.) but not less than 3419.34 sq. cm. (530 sq. in.) of frontal area. The radiator shall fill the shell opening. The grille shell insert shall remain open as in the original configuration and be stock style or removed completely.
Any frame may be used which is fabricated of round, square, or rectangular steel tubing, not less than 5.08 cm (2 in.) x 3.048 mm (.120 in.) or channel not less than 10.16 cm (4 in.) x 3.048 mm (.120 in.) No multi-tube frames may be used. Any type rear end may be used and widening of the rear tread to allow the tyres to protrude beyond the fenders is permitted as long as 50% of the tyre width is still covered by the fender.
Only cylindrical tanks are allowed in front of the grille. The tank shall be mounted horizontally between and above the frame rails. The maximum allowable dimensions for the tank are: 25.4 cm (10 in.) outside diameter, 81.28 cm (32 in.) circumference, 48.26 cm (19 in.) long, mounted a maximum of 5.08 cm (2 in.) from the leading edge of the grille.
Hood length, as determined by the year of the BODY, may be increased a maximum of 7.62 cm (3 in.) as measured along the top centerline of the hood. The entrant shall provide this dimension. Front cross members may be moved to correspond to the increase in hood length. A maximum of 15% engine set back is permitted to permit adequate clearance for water pump, blower drives, etc.
The driver shall sit in the stock location and shall not be restricted from entrance to or exit from the car by the cockpit covering. The body may be channeled to the bottom of the frame. Flooring in the car shall be stock, or above the top lip of the top frame rail and comply with the definition of floorboards / floor pan contained in Section 4.P.
A rigid tonneau cover is allowed, as long as it does not violate the definition of an open car, Section 4.V.
The following as defined in Section 4 are not allowed; Sectioning of the body, Section 4.Y, Step Pan, Section 4.EE, and Streamlining, Section 4.CC and sub-sections. Louvers in the rear deck lid are allowed as long as they are sealed on the inside. Hood scoop, Section 4.R is allowed. Headers may be used, but shall terminate in a common collector, a minimum of 6” long beyond the end of the header tube.
The following items are required: a radiator, a horn, at least one tail/stop light, a transmission and two headlights facing forward in stock orientation. Headlight lenses shall be at least 12.7 cm (5 in.) in diameter. Both lights shall be mounted outside the vertical edges of the grille shell and between 45.72 cm (18 in.) and 60.96 cm (24 in.) from the ground, measured to the centerline of the headlight.
The following items are optional: bumpers, current registration, generator, hood side panels, parking brake, license plate, front fenders, running boards or windshield.
Engine classes allowed are: AA, A, B, C, D, E, F, G, H, XF, XO, XXF, XXO, V4 and V4F

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5.B.4 VINTAGE Classes

The rules in these classes are identical to the respective Modified Category classes, except that only 1948 or earlier bodies with XF, XO, XXF, XXO, V4 or V4F engines are allowed.  In all classes except VGC, fenders and running boards may be removed if it can be done by unbolting the fenders from the body. Pre-1949 bodies may have a 7.62 cm (3-in.) beauty chop. Pre-1949 cars shall have radiator/grille shells of the same manufacturer as the body, e.g., Ford on Ford, Chevy on Chevy, etc.  Air dams are not permitted in the Vintage Gas Coupe and Sedan classes using vintage engines. Minor trim items, door handles, exposed hinges and rain gutters may be removed in the Competition Coupe and Altered classes only. Minor trim items may be removed in the Gas Coupe classes.
One of the following modifications shall be done to be considered in the Vintage Competition Coupe class:

1. The top shall be chopped more than 7.62 cm (3-in.) lower than the OEM height. The owner shall provide documentation of the OEM top height measured at the center of the cowl.
2. The vehicle shall have a belly pan.
3. The body from the cowl forward shall be lengthened a minimum of 30.48 cm (12 in.)
4. The engine shall be set back a minimum of 25% of the wheelbase. The engine setback cannot exceed 50% of the wheelbase.

All closed vehicles that would qualify as a V4 or V4F Production Coupe or Sedan will compete in the V4/V4F Gas Coupe class. All open vehicles that would qualify as V4 or V4F production roadster will compete in the V4/V4F Street Roadster class.
All vehicles will run only in the lowest primary class/category for which they are legal, see Section 1.B.

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5.B.5 Vintage Oval Track - /VOT

Midget Vintage Oval Track - /MVOT

The Vintage Oval Track class is for vintage engine, old-style open wheel, rear drive, dirt track and Indy, one or two seat cars, with a tapered tail and cowl. The appearance and design of cars in this category shall be practical for, and as were used in OVAL TRACK and SPEEDWAY competition from the late 1920s to 1957. A limb restraint system (3.D.3 and 4.U) extending from the firewall to behind the driver’s seat requiring the driver’s feet to be retained and protected, will be strictly enforced. A belly pan alone is not acceptable.
The vintage engines permitted in this class have to be built with pre-1948 design engine blocks; i.e., no modern overhead V8s or blowers or other power adders are allowed.
Transmission shall not exceed 4 speeds for manual / stick shift transmissions and 3 speeds for automatic transmissions (no overdrive). The use of electronic, or other pedal shifters and additional overdrives are NOT permitted. Manual valve shifting on automatic transmissions is allowed along as it is accomplished with a mechanical shifter.
The cars and engines in this category should also resemble historic, documented cars and be in a period correct relation to each other; i.e., a GMC engine laid flat in a Kuzma Roadster is not allowed.
No Production body panels are permitted, except for the grill shell. No track roadster configurations are allowed. A fully functioning radiator shall be mounted in front of the engine, and the fuel tank shall be mounted in the tail behind the driver. The driver shall sit entirely behind the engine, ahead of the rear axle, and shall not recline more than 5 deg. from the vertical. The frame may be of any construction except monocoque, and all wheels shall be sprung (2.D). Shocks must be mounted outside the frame. "Knock-Off" type wheels specifically made for racing may be used in this class. Knock-Offs must be safety wired.
At least 2 Brakes on either the front or rear axle are required. No front wheel only braking systems are allowed. Brakes must be mounted outside the body.
Ground effects, wings or wheel fairings are NOT permitted. Spun aluminum wheel discs are allowed. The usual track- style nerf bars are optional if they give no aerodynamic aid.
If required, parachute packs must be mounted behind the roll cage (on top of the tail) or in the push bar area. No fairing, molding or wings permitted.
Tarps and Panels may be fitted around the cockpit, but there may be no covering above the driver's head, except for the roll cage, nor any panel that shall be moved or swung to safely enter or exit the cockpit.
Grille/Nose opening must resemble the documented race car and can NOT be filled. Air inlet opening in grille/nose must be a minimum of 193.548 sq. cm. (30 sq. in.) for VOT and 161.29 sq. cm. (25 sq. in.) for MVOT, not including the grille and/or grille bars.
Excessive engine set back is prohibited. The most rear edge of the engine block may not extend inside the cowl section
Direct mounted dog clutches or Offy (NOT Ford A) drum-type flywheel- clutch assemblies need not be covered by a scatter shield, see Section 3.O.
All other safety rules are applicable. Particular attention will be paid to arm restraints, adequate caster, and proper steering ratios.
All cars shall be equipped with a full roll cage, see Section 3.B. Fuel is restricted to gasoline or alcohol. Nitro methane or nitrous oxide is not allowed. In this class ONLY, non-production overhead cam engines of pre-’48 design (Miller, Offy, HAL, etc.) run in XXO Class.
ALL NEW CARS or EXISTING CARS where body modifications are being made shall be submitted to the VOT Category Chair for approval.
Engine classes allowed are XO, XF, XXF, XXO, V4 and V4F
Maximum cid Midget Vintage Oval Track/MVOT
Flathead              150 cid
Overhead            125 cid

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5.C CLASSIC CATEGORY

#1 Engine Classes: AA, A, B, C, D, E, F, G, H, I, J
#2 Engine Classes: AA, A, B, C, D, E, F, G, H, I, J
#3 Engine Classes: C, D, E

This category encompasses American and Foreign coupes and sedans produced between 1928 and 1981 with a production rate of at least 500 vehicles of the same model for sale to the general public. Entries shall be unaltered in height, width, and contour with all stock panels, i.e., hoods, fenders, doors, etc., mounted in their original relationship to each other.
A generic requirement for this category is the car shall have been originally produced with factory-installed seating for 4 or more people, i.e., adults or children. If the car was produced and sold with 2 seats on some models and 4 seats (including jump seats) on other models, the car will be classified as a Coupe and Sedan. For reasons of economy and historical authenticity, certain electronic engine technologies are not allowed. All entrants running in Classic classes must have pictures of the car as produced with their Logbook for certification purposes.
Classes within the Classic Category are the equivalent of the Modified and Production categories with body modifications as allowed in those categories. American coupes and sedans in the year range of 1928-1948 using non-vintage engines may compete with the fenders and running boards removed in the Classic Category, Altered class. Within the Classic Category pre-1949 bodies may have a 7.62 cm (3-in.) beauty chop.
In order to prevent a vehicle from competing in both the Classic and Modified categories, the following policy is established: American coupes and sedans within the year range of 1928-1948 using non-vintage engines such as a Chevy 350, Ford 351, and Chrysler Hemi OHV V-8, etc.  may compete within the Classic Category classes. Body modifications shall comply with the class in which the vehicle is entered. El Caminos and Rancheros meeting the requirements within this category will compete in the appropriate class.
The following items ARE allowed: capacitive discharge type ignition systems with rev limiter, carburetors or mechanical fuel injection, one distributor or one magneto (one ignition system only) and OEM EFI. Sensor controlled ignitions are allowed but shall be stock and not modified in any way for the year and model of the vehicle entered. Direct-reading gauges, either electronic or mechanical, and data recorders are allowed.
The following items are NOT allowed: non-OEM Electronic Fuel Injection, (EFI), sensor-controlled engine management systems with feedback loop, and multiple magnetos or distributors.
THE MINIMUM REQUIREMENT FOR A VEHICLE WITHIN THE YEAR RANGE OF 1928-1981 TO COMPETE IN THE MODIFIED OR PRODUCTION CATEGORIES SHALL BE THE USE OF A NON-O.E.M. EFI SYSTEM.
Once a vehicle in the Classic Category has competed in an SCTA-BNI sanctioned event, the vehicle shall remain in that category for the current racing season.
All vehicles entered in the CLASSIC category, shall have all flammable interior items removed where possible. For example, all floor coverings (including firewall), headliner, door panels, side and rear trim / upholstery. Door and side panels shall be replaced with non-flammable replacement. For example, aluminum panels. A stock dashboard may be retained or must be replaced with a fabricated non-flammable equivalent.

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5.D MODIFIED CATEGORY

This category encompasses American and foreign coupes and sedans and utes unaltered in height, width or contour, and with all stock panels mounted in original relationship to each other. The vehicle has been modified to such an extent that it no longer fits into the Production Category. A generic requirement for this category is the car shall have been originally produced with factory installed seating for 4 or more people, i.e. adults or children. If the car was produced and sold with 2 seats on some models and 4 seats (including jump seats) on other models, the car will be classified as a Coupe and Sedan. Examples include Honda CRX, Ford Mustang GT 350's, Porsche, Nissan Z 2+2, etc.
Vehicles running in UTE class are exempt from any seating requirements.

All entrants running in Modified classes must have pictures of the car as produced with their Log Book for certification purposes.
Within the Modified category the amount of modification determines the class. For example, a Gas Coupe is basically a Production car with an engine swap, an Altered is a Gas Coupe with headlights and grille covered and the engine set back, a Competition Coupe is an Altered with the nose lengthened and streamlined.
In classes where the removal of rear-view mirrors is allowed the OEM fender or door shape must be retained. If a fender stamping has a mirror housing as part of the fender or door, that shape must be retained.

Front air dams and splitters are permitted in the Modified Category, see Section 4. CC.1. In Gas Coupe and Sedan and Ute Classes the original grill opening shall remain uncovered.
Vehicles in this category that exceed 200 MPH, or if the existing class record is in excess of 200 MPH, shall have roof rails, Section 4. X
Vehicles competing in the Competition Coupe and Modified Sports and Ute classes shall have documentation showing the stock vehicle BEFORE modification.
El Caminos and Rancheros meeting the requirements within this category will compete in the appropriate class.

All vehicles entered in the MODIFIED category, shall have all flammable interior items removed where possible. For example, all floor coverings (including firewall), headliner, door panels, side and rear trim / upholstery. Door and side panels shall be replaced with non-flammable replacement. For example, aluminum panels. A stock dashboard may be retained or must be replaced with a fabricated non-flammable equivalent.

5.D.1.a Competition Coupe & Sedan: /BFCC, /FCC, /BGCC, /GCC

This class encompasses production coupe or sedan bodies unaltered in width or contour. Streamlining ahead of and including the cowl, channeling, belly pan and skirts and spoilers, as defined in Section 4.CC. is permitted. One of the following modifications SHALL be done to be considered in this class:

1. Top shall be chopped.
2. The vehicle shall have a belly pan.
3. The body from the cowl (4. MM) forward shall be lengthened a minimum of 30.48 cm (12 in.)
4. The engine shall be set back a minimum of 25% of the wheelbase. The engine setback cannot exceed 50% of the wheelbase (4. AA).

Other than top chopping (4. I), no modification to the body is allowed. Minimum vertical windshield height is 12.7 cm (5 in.). The front and rear chop shall be equal. Window openings may be covered by flat plates on the outside of the opening or left open. Driver shall sit COMPLETELY ahead of the rear axle, inside the body and behind the engine, except in rear-engine cars using the original engine LOCATION. Driver exit hatches in the roof are recommended but shall not change the contour of the body. Cars in this class are considered in the Modified category and shall comply with the general rules of the category.
Wing width including side plates shall not be wider than the outside width of the body. The maximum allowable height of the wing including side plates shall not exceed 165.1cm (65 in.) from the ground as measured to the highest part of the wing. The rear of the wing including side plates may not be set back more than 45.72 cm (18 in.) behind the rear of the body. The lowest portion of the wing shall be at least 15.24 cm (6 in.) above the highest point of the body.  The total wing area (measured by the fore-to-aft dimension times the side-to-side dimension on the top surface) shall not exceed 7432.24 sq. cm (1152 sq. in.) Multiple element wings are NOT allowed.

NOTE: Entrants electing to use a pre-1949 body in the Competition Coupe classes need not comply with the seating requirement, as described in 5 D above. The rear inner fender panels may be modified to allow the rear tyres to be located within the body. This rear fender panel allowance does NOT apply to Vintage Category vehicles using vintage engines. Drip rails may be removed or filled.
Engine classes allowed are: AA, A, B, C, D, E, F, G, H, I, J, XF, XO, XXF and XXO

5.D.1.b Competition Ute - /BFCU, /FCU, /BGCU, /GCU

This class encompasses production utes that are a derivative of an Australian based sedan 1928 to current year, unaltered in width or contour. Streamlining ahead of and including the cowl, channeling, belly pan and skirts and spoilers, as defined in Section 4.CC. is permitted. One of the following modifications SHALL be done to be considered in this class:

1. Top shall be chopped.
2. The vehicle shall have a full belly pan.
3. The body from the cowl forward shall be lengthened a minimum of 30.48 cm (12 in.).
4. The engine shall be set back a minimum of 25% of the wheelbase. The engine setback cannot exceed 50% of the wheelbase.

Other than top chopping, no modification to the body is allowed. Minimum vertical windshield height is 12.7 cm (5 in.) The front and rear chop shall be equal. Window openings may be covered by flat plates on the outside of the opening or left open. Driver shall sit COMPLETELY ahead of the rear axle, inside the body and behind the engine, except in rear-engine cars using the original engine LOCATION. Driver exit hatches in the roof are recommended but shall not change the contour of the body. Cars in this class are considered in the Modified category and shall comply with the general rules of the category.
Wing width including side plates shall not be wider than the outside width of the body. The maximum allowable height of the wing including side plates shall not exceed 65 in. from the ground as measured to the highest part of the wing. The rear of the wing including side plates may not be set back more than 45.72 cm (18 in.) behind the rear of the body. The lowest portion of the wing shall be at least 15.24 cm (6 in.) above the highest point of the body.  The total wing area (measured by the fore-to-aft dimension times the side-to-side dimension on the top surface) shall not exceed 7432.24 cm (1152 sq. in.) Multiple element wings are NOT allowed.

5.D.1.c  COMPETITION PICKUP - /BFCP, /FCP, /BGCP, /GCP

This class encompasses production pickup bodies (separate body to cargo bed) unaltered in width or contour. Streamlining ahead of and including the cowl, channeling, belly pan and skirts and spoilers, as defined in Section 4.CC. is permitted. One of the following modifications SHALL be done to be considered in this class:

1. Top shall be chopped.
2. The vehicle shall have a belly pan.
3. The body from the cowl (4. MM) forward shall be lengthened a minimum of 30.48 cm (12 in.)
4. The engine shall be set back a minimum of 25% of the wheelbase. The engine setback cannot exceed 50% of the wheelbase (4. AA).

Other than top chopping (4. I), no modification to the body is allowed. Minimum vertical windshield height is 12.7 cm (5 in.). The front and rear chop shall be equal. Window openings may be covered by flat plates on the outside of the opening or left open. Driver shall sit COMPLETELY ahead of the rear axle, inside the body and behind the engine, except in rear-engine cars using the original engine LOCATION. Driver exit hatches in the roof are recommended but shall not change the contour of the body. Cars in this class are considered in the Modified category and shall comply with the general rules of the category.
Wing width including side plates shall not be wider than the outside width of the body. The maximum allowable height of the wing including side plates shall not exceed 165.1cm (65 in.) from the ground as measured to the highest part of the wing. The rear of the wing including side plates may not be set back more than 45.72 cm (18 in.) behind the rear of the body. The lowest portion of the wing shall be at least 15.24 cm (6 in.) above the highest point of the body.  The total wing area (measured by the fore-to-aft dimension times the side-to-side dimension on the top surface) shall not exceed 7432.24 sq. cm (1152 sq. in.) Multiple element wings are NOT allowed.
NOTE: Entrants electing to use a pre-1949 body in the Competition Pickup classes. The rear inner fender panels may be modified to allow the rear tyres to be located within the body. This rear fender panel allowance does NOT apply to Vintage Category vehicles using vintage engines. Drip rails may be removed or filled.
Engine classes allowed are: AA, A, B, C, D, E, F, G, H, I, J, XF, XO, XXF and XXO

5.D.2.a Altered Coupe: /BFALT, /FALT, /BGALT, /GALT

This class encompasses American coupe or sedan bodies 1982 to the current year, and foreign coupe or sedan bodies 1928 to the current year, unaltered in height, width, length, or contour. The body shall be mounted to the chassis with all body panels mounted in the original relationship to each other. One of the following modifications shall be done to be considered in this class:

1. The addition of a step pan as defined in Section 4. EE.
2. The engine set back a maximum of 25% of the wheelbase as defined in Section 4. AA.
3. A front-wheel drive vehicle converted to rear wheel drive.
4. Covered headlights and grille as described below.

Any frame may be used as long as the bottom line of the frame is not higher than the outer bottom line of the body between the firewall and the rear wheels. An exception will be made if a stock frame and the same year/make of body are being used. If the ORIGINAL frame/body relationship is such that the lower bottom line of the frame is above the outer bottom line of the body, that frame/body combination may be used. The burden of proof of the ORIGINAL frame/body relationship lies with the entrant. The frame may not be exposed from the bottom of the body. This rule does NOT apply to Vintage body class vehicles.
This class is allowed a 2% maximum body stretch in the cowl area, in front of the firewall. This does not apply to Vintage class.  An engine swap as defined in Section 4. N is permitted.
No streamlining, as described in Section 4. CC is allowed, unless specified.  Wheel wells may not be filled or covered.  Bumpers, grilles, and front lights may be removed, and the opening created may be filled or covered. The filled or covered area may be flush with the adjacent body; the basic shape and contour of the vehicle cannot be changed. Engine intake air may be ducted from these openings. Aftermarket front ends are allowed as long as the item conforms to the class guidelines. Any horizontal paneling which may be construed as a belly pan is prohibited. No taped or filled body, door or window seams are allowed from the firewall back. Windows shall be mounted in the stock fashion or fastened to the inside of the window openings. A non-stock spoiler is permitted as defined in Section 4. CC.6.  Any type of exhaust may be used and can exit anywhere from the body but the top.
Roof-mounted spoilers, other than original for the body used, are prohibited. Pre-1949 bodies may be chopped. The chop shall be equal front to rear and shall retain a vertical windshield height of at least 15.24 cm (6 in.) above the top of the cowl with a maximum horizontal length of 17.78 cm (7 in.) from the base of the windshield at the center of the car. The driver shall sit completely ahead of the rear axle, inside the body, and behind the engine, except in rear-engine cars using the original engine LOCATION. Drip rails may be removed or filled.
Cars in this class are considered in the Modified Category and should comply with the General Rules of the category. Coupes and sedans produced from 1949 to the current model year, not meeting the criteria of the Classic Category, shall compete in the Modified Category classes. Vehicles in this category that exceed 200 MPH, or if the existing record is over 200 MPH, shall have roof rails.

Engine classes allowed are: AA, A, B, C, D, E, F, G, H, I, J, XF, XO, XXF, and XXO

5.D.2.b Altered Ute - /BFALTU, /FALTU, /BGALTU, /GALTU

This class encompasses utes that are a derivative of an Australian based sedan 1928 to the current year, unaltered in height, width, length, or contour. The body shall be mounted to the chassis with all body panels mounted in the original relationship to each other. One of the following modifications shall be done to be considered in this class:

1. The addition of a step pan as defined in Section 4.EE.
2. The engine set back a maximum of 25% of the wheelbase as defined in Section 4.AA.
3. Covered headlights and grille as described below.

Any frame may be used as long as the bottom line of the frame is not higher than the outer bottom line of the body between the firewall and the rear wheels. An exception will be made if a stock frame and the same year/make of body are being used. If the ORIGINAL frame/body relationship is such that the lower bottom line of the frame is above the outer bottom line of the body, that frame/body combination may be used. The burden of proof of the ORIGINAL frame/body relationship lies with the entrant. The frame may not be exposed from the bottom of the body.
This class is allowed a 2% maximum body stretch in the cowl area, in front of the firewall. This does not apply to Vintage class.  An engine swap as defined in Section 4.N is permitted.
No streamlining, as described in Section 4.CC is allowed, unless specified.  Wheel wells may not be filled or covered.  Bumpers, grilles, and front lights may be removed, and the opening created may be filled or covered. The filled or covered area may be flush with the adjacent body; the basic shape and contour of the vehicle cannot be changed. Engine intake air may be ducted from these openings. Aftermarket front ends are allowed as long as the item conforms to the class guidelines. Any horizontal paneling which may be construed as a belly pan is prohibited. No taped or filled body, door or window seams are allowed from the firewall back. Windows shall be mounted in the stock fashion or fastened to the inside of the window openings. A non-stock spoiler is permitted as defined in Section 4. CC.6.  Any type of exhaust may be used and can exit anywhere from the body but the top.
Roof-mounted spoilers, other than original for the body used, are prohibited. Pre-1949 bodies may be chopped. The chop shall be equal front to rear and shall retain a vertical windshield height of at least 6 in. above the top of the cowl with a maximum horizontal length of 17.78 cm (7 in.) from the base of the windshield at the center of the car. The driver shall sit completely ahead of the rear axle and behind the engine. Drip rails may be removed or filled.
Utes in this class are considered in the Modified Category and should comply with the General Rules of the category. Vehicles in this category that exceed 200 MPH, or if the existing record is over 200 MPH, shall have roof rails.
Engine classes allowed are: AA, A, B, C, D, E, F, G, H, I, J, XF, XO, XXF, and XXO

5.D.3.a Gas Coupe and Sedan: /BGC, /GC

This class encompasses American coupe, sedan or convertible bodies 1928 to current year, and foreign coupe, sedan or convertible bodies 1928 to current year, which shall have at least one of the following:

• Engine swap
• Quick-change rear end
• Conversion from naturally aspirated to blown

any one of which makes the car ineligible for competition in Production class. A production rate of at least 500 vehicles of the same model for sale to the general public is considered to meet the requirement of a production automobile. Front-wheel drive cars that have been converted to rear-wheel drive are not permitted in this class.
Gas Coupes may not be altered in height, width, length, or contour. All body panels shall be mounted in the original relationship to each other. An engine swap as defined in Section 4.N is permitted.
All vehicles shall use a seat designed for racing, see Section 3. D.1. The upholstery and the passenger seat assembly may be removed. The engine may be set back a maximum of 2% of the wheelbase.
The following items shall be retained in the stock location and of the same year as the body: frame, fenders, hood, grille, drip rails (shall not be filled), windows, door handles, window trim, headlights (high and low beam), tail lights, parking lights, stop lights and bumpers. The filling of the gap between the trailing edge of the hood and the cowl/firewall is not allowed. Decals are not acceptable as meeting the headlight and taillight requirements. A replacement radiator of the same height and width and mounted in the original location as OEM shall be used.  Blocking of air flow thru the radiator in front or behind is not allowed. An on-board starter capable of starting the engine shall be used.
Convertibles are restricted to the Gas Coupe & Sedan and Production category classes only. Convertibles shall run with the top and rear windows in the up position.
Within the Gas Coupe & Sedan classes the following body and chassis modifications may be made: wheel openings may be radiused for tyre clearance, the generator/alternator, horn, and stock gas tank may be removed, headers may be used, no individual stacks allowed, exhaust collectors may exit through the front fenders, minor chrome trim, rearview mirrors and emblems may be removed. Air intakes, see Section 4.B, may be used.
The following are not permitted: streamlining as described in Section 4.CC unless specified, air vents, headlight air intake, channeling, exhaust outlets through the doors or hood, blocked off grilles or radiators, taped or filled body, door, or window seams and one-piece front ends.
NOTE: Any “narrowing” or fairing of bumpers into the body will result in the car being placed in Altered Class. Bumpers shall be stock and in the stock position. Air dams are allowed but shall not cover the original grille opening. See specifications outlined in Modified Category description.
Coupes and sedans produced from 1949 to the current model year, and not meeting the criteria of the Classic Category, shall compete in the Modified Category classes. Vehicles in this category that exceed 200 MPH, or if the existing class record is in excess of 200 MPH, shall have roof rails, see Section 4.X
Engines classes allowed are: AA, A, B, C, D, E, F, G, H, I, J, XF, XO, XXF, and XXO

5.D.3.b Gas Ute - /BGU, /GU

This class encompasses utes that are a derivative of an Australian based sedan 1928 to the current year, which shall have at least one of the following:

• Engine swap
• Quick-change rear end
• Conversion from naturally aspirated to blown

any one of which makes the car ineligible for competition in Production class. A production rate of at least 500 vehicles of the same model for sale to the general public is considered to meet the requirement of a production automobile.
Gas Utes may not be altered in height, width, length, or contour. All body panels shall be mounted in the original relationship to each other. An engine swap as defined in Section 4.N is permitted.
All vehicles shall use a seat designed for racing, see Section 3. D.1. The upholstery and the passenger seat assembly may be removed. The engine may be set back a maximum of 2% of the wheelbase.
The following items shall be retained in the stock location and of the same year as the body: frame, fenders, hood, grille, drip rails (shall not be filled), windows, door handles, window trim, headlights (high and low beam), tail lights, parking lights, stop lights and bumpers. Decals are not acceptable as meeting the headlight and taillight requirements. A replacement radiator of the same height and width and mounted in the original location as OEM may be used.  Blocking of air flow thru the radiator in front or behind is not allowed. An on-board starter capable of starting the engine shall be used.
Within the Gas Ute classes, the following body and chassis modifications may be made: wheel openings may be radiused for tyre clearance, the generator/alternator, horn, and stock gas tank may be removed, headers may be used, no individual stacks allowed, exhaust collectors may exit through the front fenders, minor chrome trim and emblems may be removed. Air intakes, see Section 4. B, may be used.
The following are not permitted: streamlining as described in Section 4. CC unless specified, air vents, headlight air intake, channeling, exhaust outlets through the doors or hood, blocked off grilles or radiators, taped or filled body, door, or window seams and one-piece front ends.
NOTE: Any “narrowing” or fairing of bumpers into the body will result in the car being placed in Altered Class. Bumpers shall be stock and in the stock position. Air dams are allowed but shall not cover the original grille opening. See specifications outlined in Modified Category description.
Vehicles in this category that exceed 200 MPH, or if the existing class record is in excess of 200 MPH, shall have roof rails, see Section 4. X
Engines classes allowed are: AA, A, B, C, D, E, F, G, H, I, J, XF, XO, XXF, and XXO

5.D.4 Modified Sports: /BMS, /MS (Gas Only)

This class is intended for production sports cars as accepted for GT class, which have been modified to such an extent as to make the vehicle illegal for the Production Category. This class is limited to production (a minimum of 500 vehicles) of the same model for sale to the general public. Limited production (a minimum of 50 examples produced) sports car bodies, which may be placed on any frame, will be permitted. No “one-of-a-kind” bodies will be allowed. Production sports cars with an engine swap (4. N) will be allowed.
Streamlining ahead of and including the cowl, channeling, belly pan and skirts is allowed. Channeling (4. I.1), Belly Pan (4. CC.3), Skirts (4. cc.7), Spoilers (4. CC.8) and Strakes (4. CC.9) are allowed. Front tread width may be narrowed to a minimum of 68.58 cm (27 in.). Removal of minor trim and bumpers is allowed as long as the body is not altered in length, width or contour. Windshields may be lowered or removed.
Coupe tops may be chopped. The top chop must maintain a minimum vertical windshield height of 5 inches. The lower location of the A, B and/or C pillars must be in original OEM location and the A pillar must be OEM width. A top chop by definition alters the contour of the vehicles.  Drip rails may be removed or filled.
No wings are allowed unless the wing was offered as an OEM item for the year/model of vehicle used. The wing shall have been available on the vehicle as purchased new and the wing shall remain unmodified and mounted in the stock location as purchased from the dealer.  The entrant is required to provide suitable documentation.
Any frame may be used; see Section 2.C. Maximum wheelbase allowed shall be 330 cm (130 in.). Any type of rear end may be used.
Engine placement is optional, so long as no change is made to the driver’s location as originally designed. The driver shall be seated behind the engine, except in the case of production and limited production bodies which are designed for mid/rear-engine locations. The driver shall not be restricted from entry or exit of the vehicle by the cockpit covering.
The following items are required: a starter capable of starting the engine, tail/stop lights, a transmission (either manual or automatic), and a radiator when originally equipped.
The following items are not permitted: Air Vents (Section 4.C), Headrest Fairing (Section 4. CC.4) which extends past the rear of the body and taping and filling of body and window seams.
Engine classes allowed are: AA, A, B, C, D, E, F, G, H, I

5.D.4a Modified Grand Touring Sport (Gas Only)

This class is intended for series production sports cars which have been modified to such an extent to make them illegal for the production (GT) class and limited production sports car type bodies such as Kellison, Devin, Victress, Bradley and Sterling which may be placed on a production or specially constructed frame. This class is limited to production and limited production (a minimum of 50 produced) of the same model for sale to the general public. No “One of a Kind” type bodies will be permitted.
One of the following modifications shall be done to be considered in this class:
1. The addition of a belly pan
2. A quick change rear end
3. An engine swap
4. A front-wheel drive vehicle converted to rear-wheel drive or a rear-wheel-drive vehicle converted to a front wheel drive
Production sports cars with an engine swap (4.N) will be legal for the class. Blowers may be used.
A GT Sports body may not be altered in height, width, length, or contour. The wheelbase shall not be altered. All body panels shall be mounted in the original relationship to each other.
Factory soft top or open convertible windshields may be lowered or removed. Tonneau covers (2.O) are allowed.
Any frame may be used as long as the bottom line of the frame is not higher than the outer bottom line of the body between the firewall and the rear wheels. An exception will be made if a stock frame and the same year/make of body are being used. If the ORIGINAL frame/body relationship is such that the lower bottom line of the frame is above the outer bottom line of the body, that frame/body combination may be used. The burden of proof of the ORIGINAL frame/body relationship lies with the entrant. The frame may not be exposed from the bottom of the body.
Any type rear-end differential may be used.
No change can be made to the driver's location as originally designed and the driver is seated behind the engine except in the case of production sports car type bodies which were designed and intended for rear engine usage. The driver must not be restricted from entrance or exit from the vehicle by moving the cockpit covering.
Bumpers and front lights may be removed, and the opening created may be filled or covered. The filled or covered area may be flush with the adjacent body; the basic shape and contour of the vehicle cannot be changed. Aftermarket front ends are allowed as long as they conform to the class guidelines.
Blocking the airflow thru the radiator in front or behind is not allowed.
No streamlining, as described in Section 4.CC, is allowed, unless specified. Wheel wells may not be filled or covered. Wheel well openings may be radiused for tyre clearance. No taped or filled body, door, or window seams are allowed. Windows shall be mounted in the stock fashion or fastened to the inside of the window openings. Minor chrome trim and emblems may be removed.
The following items are permitted: Air dams and Splitters (4.CC.1). Skirts (4.CC.7) A non-stock Spoiler (4.CC.8).
Any type of exhaust may be used, except no individual stacks are allowed, and can exit anywhere from the body but the roof, top of front fenders or hood.
Roof-mounted spoilers, other than original for the body used, are prohibited.
The driver shall sit completely ahead of the rear axle, inside the body, and behind the engine, except in rear-engine cars using the original engine LOCATION. Drip rails may be removed or filled.
The following items are required: a starter capable of actually starting the engine, tail/stop lights of the same year and manufacturer of the body, a full transmission, either manual or automatic utilizing the full shift pattern and gears, a radiator of the same dimensions or larger as originally equipped and mounted in the same location.
The following items are not permitted: air vents, headlight air scoops, blocked off radiator, taping of body or window seams, non-stock head rest fairings, trip fences, or vortex generators.
Cars in this class are considered in the Modified Category and should comply with the General Rules of the category.
Engine classes allowed are: AA, A, B, C, D, E, F, G, H, I, J

5.D.5 Modified Pickup Truck: BMP, MP

This class is for 1946 and later American made pickup trucks with full stock bed, unaltered in height, width, or contour, with all panels mounted in the original relationship to each other.  Samples of allowed trucks include but are not limited to: Chevrolet C series, Ford F series and others. Pickup trucks in this class are considered in the Modified Category, Gas Coupe class and shall therefore comply with all rules of this category and class. Frame “clips” are allowed in front of and to the rear of the cab. The original frame shall be in place under the cab. Frame cross members may be moved, modified, replaced, or removed.
Minimum requirements to compete in the Modified Pickup class are at least one of the following:

• Engine swap
• Quick-change rear end
• Conversion from naturally aspirated to blown

Production pickups with a supercharger and/or full-time four-wheel drive shall compete in this category and class. No streamlining as described in Section 4.CC is allowed unless specified.
Covering of pickup beds with tarps or panels is allowed. The cover shall be no higher than the edge of the pickup bed. Aftermarket bed caps are allowed but shall not allow any aerodynamic advantage. Pickups may run with the tailgate raised, lowered or removed. All parachute packs shall be mounted below the bed rail level. The exhaust shall not exit through the pickup bed floor.
Pickups with cab-mounted gas tanks shall have the gas tank removed. The tank shall be relocated so as to offer no aerodynamic advantage.
Rear bumper may be removed.
Engine classes allowed are: AA, A, B, C, D, E, XF, XO, XXF and XXO

5.D.6 Modified Mid/Mini Pickup Truck - BMMP, MMP

This class is for 1972 and later American and foreign made mid and mini sized pickup trucks with full stock bed, unaltered in height, width or contour with all panels mounted in the original relationship to each other.  Samples of allowed trucks include but are not limited to: Chevrolet S-10, Ford Ranger, Nissan and Toyota.
Pickup trucks in this class are considered to be in the Modified Category, Gas Coupe class and therefore shall comply with all rules of this category and class. Frame “clips” are allowed in front of and to the rear of the cab. The original frame shall be in place under the cab. Frame cross members may be moved, modified, replaced or removed.
Minimum requirements to compete in the Modified Mid/Mini Pickup class are at least one of the following:

• Engine swap
• Quick-change rear end
• Conversion from naturally aspirated to blown

Production pickups with a supercharger and/or full-time four-wheel drive shall compete in this category and class. No streamlining as described in Section 4.CC is allowed unless specified.
Covering of pickup beds with tarps or panels is allowed. The cover shall be no higher than the edge of the pickup bed. Aftermarket bed caps are allowed but shall not allow any aerodynamic advantage. Pickups may run with the tailgate raised, lowered or removed. All parachute packs shall be mounted below the bed rail level. The exhaust shall not exit through the pickup bed floor.
Rear bumper may be removed.
Engine classes allowed are; C, D, E, F, G, H and I

5.D.7 TRACK and CIRCUIT CARS

This class is for existing competition cars previously used in other formulas or circuit racing in Australia. It provides for the cars to be used for land speed racing with a minimal amount of safety modifications so as not to destroy the authenticity or heritage of the car. The compromise is that these cars must run the same engines and running gear that was used in the day.

5.D.7a TRACK NASCAR - /TNGEN1, /TNGEN2, /TNGEN3, /TNGEN4, /TNGEN5

This class is for NASCAR bodied vehicles.
To qualify in the NASCAR class (/TNGEN1, /TNGEN2, /TNGEN3, /TNGEN4, /TNGEN5) the vehicle must be based on an existing NASCAR body and chassis built before 2013 and resemble one of the manufacturers vehicles that competed in NASCAR either in the USA or Australia.
The classes are based on the long history of NASCAR and the generational change that has taken place.

Typically, the car has a stock body with a modified frame and modified chassis. The driver shall sit COMPLETELY ahead of the rear axle, inside the body and behind the engine. Driver exit hatches in the roof are recommended but shall not change the contour of the body.
Cars in this class are considered in the Modified category and shall comply with the general rules of the category and the technical specifications found in Section 3.
The roll cage as fitted for this category of vehicle usually exceeds the DLRA specifications, however additional bars and or gussets may be required by the DLRA technical Committee. This can only be determined after an initial inspection prior to presenting at the lake.
Vehicles in this category that exceed 200 MPH, or if the existing class record is in excess of 200 MPH, shall have roof rails, Section 4. X.
In the interests of safety over authenticity, vehicles in this category that exceed 175 MPH may have spoilers fitted as described in Section 4.CC.8.
Vehicles in this category that exceed 175 MPH must have one of more parachutes fitted as per Section 4.CC.5. Two parachutes are mandatory for vehicles exceeding 250 MPH.
All cars must use up to a 6.1-litre, naturally aspirated V8 engine.
Externally, the engine must appear almost stock.
The entrant shall provide the documentation that the vehicle did run in a NASCAR or AUSCAR Series.
Engine classes allowed are: C

5.D.7b TRACK AUSCAR - /TAUS

To qualify for the AUSCAR class the vehicle must be based on the Commodores and Falcons that ran in AUSCAR in Australia. Eligible models include the VB, VC, VH, VK, VL, VN, VP, VR and VS Commodores, and XD, XE, XF, EA, EB, ED, EF and EL Falcons. To be eligible a logbook must be supplied as proof that the vehicle competed in a AUSCAR event.
Vehicles must display all AUSCAR modifications. Front and rear spoilers may be used as found in the day, factory windscreen glass required with AUSCAR safety bars, rear, and side windows to be polycarbonate, front door glass is removed completely. Headlight, tail-light and blinker openings are covered with steel, factory grilles are used, custom miniature side mirrors are normally fixed to the rear of the driver's A-pillar, and doors are welded shut (requiring ingress and egress through the window opening). All other panels are standard.

Typically, the car has a stock body with a modified frame and modified chassis. The driver shall sit COMPLETELY ahead of the rear axle, inside the body and behind the engine. Driver exit hatches in the roof are recommended but shall not change the contour of the body.
Cars in this class are considered in the Modified category and shall comply with the general rules of the category and the technical specifications found in Section 3.
The roll cage as fitted for this category of vehicle usually exceeds the DLRA specifications, however additional bars and or gussets may be required by the DLRA technical Committee. This can only be determined after an initial inspection prior to presenting at the lake.
Vehicles in this category that exceed 200 MPH, or if the existing class record is in excess of 200 MPH, shall have roof rails, Section 4. X.
In the interests of safety over authenticity, vehicles in this category that exceed 175 MPH may have spoilers fitted as described in Section 4.CC.8.
Vehicles in this category that exceed 175 MPH must have one of more parachutes fitted as per Section 4.CC.5. Two parachutes are mandatory for vehicles exceeding 250 MPH.

All cars must use a naturally aspirated V8 engine, as fitted in the day.
Externally, the engine must appear almost stock.
The entrant shall provide the documentation that the vehicle did run in a NASCAR or AUSCAR Series.
Engine classes allowed are: D

5.D.7c TRACK SUPERCAR - /TS3A, /TSV8

This class is for Australian Supercars, usually based on 4 door cars from 1991 – 1996 (FTS3A) and 1997 to current (FTSV8) which are not altered in width or contour and retain their custom chassis and control body panels. They must be a body and configuration must be of a vehicle that raced in the Supercar Series.
All doors must be able to be opened. No additional modification to the body is allowed. Aerodynamics are restricted to what was available in the day. Window openings may be covered by flat plates on the outside of the opening or left open. Driver shall sit COMPLETELY ahead of the rear axle, inside the body and behind the engine. Decals are not acceptable as meeting the headlight and taillight requirements.
Cars in this class are considered in the Modified category and shall comply with the general rules of the category and the technical specifications found in Section 3.
The roll cage as fitted for this category of vehicle does not comply with the DLRA specifications, additional bars and or gussets will be required by the DLRA technical Committee. This can only be determined after an initial inspection prior to presenting at the lake.
Vehicles in this category that exceed 200 MPH, or if the existing class record is in excess of 200 MPH, shall have roof rails, Section 4. X.
In the interests of safety over authenticity, vehicles in this category that exceed 175 MPH may have spoilers fitted as described in Section 4.CC.8.
Vehicles in this category that exceed 175 MPH must have one of more parachutes fitted as per Section 4.CC.5. Two parachutes are mandatory for vehicles exceeding 250 MPH.
All cars must use up to a 5.0-litre, naturally aspirated V8 engine.
The entrant shall provide the documentation that the vehicle did run in a Supercar Series.
Engine classes allowed are: D

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5.E PRODUCTION

This category is intended to represent typical transportation vehicles, which may be purchased from ANY automobile dealer. A generic requirement for this category is the car shall have been originally produced with factory installed seating for 4 or more people, i.e. adults or children. If the car was produced and sold with 2 seats on some models and 4 seats (including jump seats) on other models, the car will be classified as a Coupe and Sedan. Examples include Honda CRX, Ford Mustang GT 350's, Porsche, Nissan Z 2+2, etc.
Utes are exempt from seating requirements.
A production rate of at least 500 vehicles of the same model and available from any dealer’s inventory for sale to the general public is considered to meet the requirement of a production automobile. In keeping with this intent, the cars are aerodynamically “stone stock” with no body parts allowed which were not parts of the manufacturer’s production for the series of the vehicle involved.  No Touring or race car panels are allowed. All entrants running in Production classes must have pictures of the car as produced with their Logbook for certification purposes.
The engine used shall have been available in the model of vehicle used as purchased from ANY automobile dealer. Modified body, body panels, spoilers, air dams, etc. intended for and as accepted or sanctioned by NASCAR, NHRA, SCCA, V8 Super car etc. are not permitted for use in this category unless specifically allowed.  A manufacturer’s part number does not necessarily imply that a part is an original, factory-installed body part.  Both exterior and interior body panels are considered to be part of a production vehicle and shall be mounted in their original relationship to each other. The filling of the gap between the trailing edge of the hood and the cowl/firewall is not allowed.
Racing seats shall be used per Section 3. D.1.
All vehicles entered in the PRODUCTION category, shall have all flammable interior items removed where possible. For example, all floor coverings (including firewall), headliner, door panels, side and rear trim / upholstery. Door and side panels shall be replaced with non-flammable replacement. For example, aluminum panels. A stock dashboard may be retained or must be replaced with a fabricated non-flammable equivalent.

A different displacement size of the same design engine may be used provided it does not constitute an engine swap as defined in Section 4.N. Any transmission, non-quick-change rear end, and an on-board starter capable of starting the engine shall be used so long as the original running gear design is retained.
Vehicles originally produced as a front-wheel drive chassis and converted to rear-wheel or four-wheel drive chassis are NOT eligible for competition in the Production Category. Choices of camshafts, induction and ignition are unlimited.
Cylinder heads are limited to original number of valves and port configuration.
Vehicles in this category that exceed 200 MPH, or if the existing record is over 200 MPH, shall have roof rails, see Section 4.X
PRODUCTION RECORDS ARE SUBJECT TO APPROVAL AND WILL BE CERTIFIED ONLY AFTER COMPARISON WITH THE MANUFACTURER’S SPECIFICATIONS FOR THE MODEL ENTERED. THE ENTRANT IS REQUIRED TO PROVIDE SUITABLE DOCUMENTATION. El Caminos and Rancheros meeting the requirements within this category will compete in the appropriate class.
XX/PRO class is limited to cylinder head port configuration as originally designed.  This applies to the XXF and XXO engine classes.
All closed vehicles that would qualify as a V4 or V4F Production coupe or sedan will compete in the V4 or V4F Gas Coupe class.
Vehicles using a hybrid power source, such as a gasoline/battery pack, will compete in the equivalent cubic inch class of the gasoline engine. The battery pack SHALL be the stock unit as sold with the vehicle model used. The battery pack will be sealed to the race vehicle to ensure that it cannot be swapped. No offboard charging of the battery packs will be allowed. If the vehicle is removed from the race meet, all previous runs will be forfeited. OEM throttle body control SHALL be used. The entrant shall provide the documentation to ensure that production units are used.

5.E.1.a Production Coupe and Sedan: /PRO

This class is for American coupes and sedans 1928 to current year, foreign coupes and sedans 1949 to current year, or 1928-1981 American coupes and sedans that do not meet the requirements for Classic Category.
The vehicle shall be unaltered in height, width or contour, with all stock panels mounted in the original relationship to each other. This category does not include cars properly classified as Sports or GT. A production rate of at least 500 vehicles of the same model for sale to the general public is considered to meet the requirement of a production automobile. The entrant shall provide the documentation to ensure that production requirements are met.
The following items shall be retained in the stock location and of the same year and manufacture as the body: frame, floor pan, fenders, hood, grille, drip rails (shall not be filled), windows, door handles, window trim,  headlights (high and low beam), taillights, parking lights, stop lights, front and rear bumpers and horn. A replacement radiator of the same height and width and mounted in the original location as OEM shall be used.  Blocking of air flow thru the radiator in front or behind is not allowed.
Decals are not acceptable as meeting the headlight and taillight requirements. The stock gas tank shall be fitted but need not be used.
The following body and chassis modifications may be made: headers, hood scoop (Section 4.R), wheel openings may be radiused for tyre clearance. Passenger and rear seat may be removed. Air dams and air spoilers identical to factory optional equipment (OEM) for the body in question may be added.
The following are NOT permitted: Streamlining, (4.CC and subsections), Air Ducts (4.A), Air Vents (4.C), Chopping (4.I), and Channeling (4.I.1). Rules for these classes will be strictly enforced to ensure that cars entered are typical of street machines that may be purchased from ANY automobile dealer.
Coupes and sedans produced from 1949 to the current model year, and not meeting the criteria of the Classic Category, shall compete in the Modified Category classes.
Engine classes allowed are: AA, A, B, C, D, E, F, G, H, I, J, XF, XO, XXF & XXO

5.E.1.b Production Ute - /PROU

This class encompasses ute that are a derivative of an Australian based sedan 1928 to current year.
The vehicle shall be unaltered in height, width or contour, with all stock panels mounted in the original relationship to each other. This category does not include cars properly classified as Sports or GT. A production rate of at least 500 vehicles of the same model for sale to the general public is considered to meet the requirement of a production automobile. The entrant shall provide the documentation to ensure that production requirements are met.
The following items shall be retained in the stock location and of the same year and manufacture as the body: frame, floor pan, fenders, hood, grille, drip rails (shall not be filled), windows, door handles, window trim, headlights (high and low beam), taillights, parking lights, stop lights, front and rear bumpers and horn. A replacement radiator of the same height and width and mounted in the original location as OEM may be used.  Blocking of air flow thru the radiator in front or behind is not allowed.
Decals are not acceptable as meeting the headlight and taillight requirements. The stock gas tank shall be fitted but need not be used.
The following body and chassis modifications may be made: headers, hood scoop (Section 4.R), wheel openings may be radiused for tyre clearance. Passenger seat may be removed. Air dams and air spoilers identical to factory optional equipment (OEM) for the body in question may be added.
The following are NOT permitted: Streamlining, (4.CC and subsections), Air Ducts (4.A), Air Vents (4.C), Chopping (4.I), and Channeling (4.I.1). Rules for these classes will be strictly enforced to ensure that cars entered are typical of street machines that may be purchased from ANY automobile dealer. Cars in this class are considered in the Production Category (5.E), Production Class (5.E.1) and shall therefore comply with all the rules of this category and class.

Engine classes allowed are: AA, A, B, C, D, E, F, G, H, I, J, XF, XO, XXF & XXO

5.E.2.a Production-Supercharged: /PS

This class is intended for American and foreign coupes and sedans that meet the requirement of the Production Coupe and Sedan Class that are equipped with factory supercharger systems. The vehicle shall be as originally equipped and configured. If the vehicle was originally equipped with one turbocharger, one turbocharger shall be used. If the vehicle was originally equipped with a belt-driven supercharger, a supercharger of that type must be used. Supercharged sports coupes equipped with rear jump seats, such as Mazda RX7 Turbo and Porsche 930 series, which would be considered a GT class vehicle, shall compete in the Blown GT class. Cars in this class are considered in the Production Category (5.E), Production Class (5.E.1) and shall therefore comply with all the rules of this category and class.
Engine classes allowed are B, C, D, E, F, G, H, I and J

This class is intended for American and foreign coupes and sedans that meet the requirement of the Production Coupe and Sedan Class that are equipped with factory supercharger systems. The vehicle shall be as originally equipped and configured. If the vehicle was originally equipped with one turbocharger, one turbocharger shall be used. If the vehicle was originally equipped with a belt-driven supercharger, a supercharger of that type must be used. Supercharged sports coupes equipped with rear jump seats, such as Mazda RX7 Turbo and Porsche 930 series, which would be considered a GT class vehicle, shall compete in the Blown GT class. Cars in this class are considered in the Production Category (5.E), Production Class (5.E.1) and shall therefore comply with all the rules of this category and class.
Engine classes allowed are B, C, D, E, F, G, H, I and J

5.E.2.b Production-Supercharged Ute - /PSU

This class is intended for utes that are a derivative of an Australian based sedan that meet the requirement of the Production Ute Class that are equipped with factory supercharger systems. The vehicle shall be as originally equipped and configured. If the vehicle was originally equipped with one turbocharger, one turbocharger shall be used. If the vehicle was originally equipped with a belt-driven supercharger, a supercharger of that type must be used. Cars in this class are considered in the Production Category (5.E), Production Class (5.E.1) and shall therefore comply with all the rules of this category and class.

Engine classes allowed are B, C, D, E, F, G, H, I and J

5.E.3 Grand Touring Sport: /BGT, /GT

This class is limited to 2-seat production sports cars like the Corvette, Honda S-2000 or Fiero as well as limited production cars like the Factory Five Cobra manufactured by a recognized automobile manufacturer intended for comfortable high-speed driving. A production rate of at least 500 vehicles of the same model for sale to the general public is considered to meet the requirements of a production automobile.
Body styles produced with jump seating for more than two people like a Datsun 280Z 2+2, Porsche 911 or Honda CRX even though they may only have two seats will be considered a Coupe and Sedan and must run in that class.
The following items shall be retained in stock location and of the same year as the body: frame, floor pan, fenders, hood, grille, drip rails (shall not be filled), windows, door handles, window trim, headlights (high and low beam), taillights, parking lights, stop lights, radiator, front and rear bumpers and horn. Decals are not acceptable as meeting the headlight and taillight requirements. The stock gas tank shall be fitted but need not be used. Cars in this class are considered in the Production Category (5.E), Production Class (5.E.1) and shall therefore comply with all the rules of this category and class.

The following body and chassis modifications may be made: wheel openings may be radiused for tyre clearance, the generator/alternator may be removed, and an exhaust system capable of being closed off may be used (no individual stacks). Air dams and air spoilers identical to factory optional equipment for the body in question may be added. All vehicles shall use a seat designed for racing, see Section 3. D.1. The original side panel upholstery or equivalent shall remain. Minor chrome trim and emblems may be removed, and an OEM Air Intake (Section 4.B) may be used. The stock windshield may not be removed or lowered.
Engine swaps in this class;

• Per Production Category rules cylinder heads are limited to the original number of valves and port configuration
• Are permitted as long as they are of the same manufacturer (e.g., Ford into Ford, Porsche into Porsche, etc.).

The following are NOT permitted: Streamlining (4.CC and subsections), Air Ducts (4.A), Air Vents (4.C) headlight air intake, Chopping (4.I) and Channeling (4.I.1).
Rules for this class will be strictly enforced to ensure that cars entered therein are typical of street machines which may be purchased from an automobile dealer.
Engine classes allowed are: AA, A, B, C, D, E, F, G, H, I and J

5.E.4 Production Pickup Truck: PP

This class is for 1946 and later American made pickup trucks with full stock bed, unaltered in height, width, and contour, with all panels mounted in the original relationship to each other.  Samples of allowed trucks include but are not limited to; Chevrolet C series, Ford F series and others.
Pickup trucks in this class are considered in the Production Category (5.E), Production Class (5.E.1) and shall therefore comply with all rules of this category and class. Frame “clips” are allowed in front of and to the rear of the cab. The original frame shall be in place under the cab. Frame cross members may be moved, modified, replaced or removed.
Any supercharger and/or production full-time four-wheel drive trucks shall compete in the Modified Category, Modified Pickup class.
Covering of pickup beds with tarps or panels is allowed. The cover shall be no higher than the edge of the pickup bed. Aftermarket bed caps are allowed but shall not allow any aerodynamic advantage. Pickups may run with the tailgate raised, lowered or removed. All parachute packs shall be mounted below the bed rail level. The exhaust shall not exit through the pickup bed floor.
Pickups with cab-mounted gas tanks shall have the gas tank removed. The tank shall be relocated to offer no aerodynamic advantage.
Rear bumper may be removed.
Cars in this class are considered in the Production Category (5.E), Production Class (5.E.1) and shall therefore comply with all the rules of this category and class.

Engine classes allowed are: AA, A, B, C, D, E, XO & XF

5.E.5 Production Mid/Mini Pickup Truck: PMP

This class is for 1972 and later American and Foreign made mid and mini sized pickup trucks with full stock bed, unaltered in height, width or contour with all panels mounted in original relationship to each other. Samples of allowed trucks include but are not limited to: Chevrolet S-10, Ford Ranger, Nissan and Toyota.

Any supercharger and/or production full-time four-wheel drive trucks must compete in the Modified Category, Modified Mid/Mini Pickup class.

Engine classes allowed are: C, D, E, F, G, H & I

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5.F DIESEL TRUCK CATEGORY

5.F.1 Unlimited Diesel Truck: /UDT

This class is for diesel-powered trucks only, modified as to be illegal for the Modified Diesel truck class. Any frame and running gear may be used and multiple engines are allowed. The body may be highly modified.
Trucks with a race weight and GVW rating more than 6577kg (14,500 lbs) are allowed unlimited engine displacement. If the truck manufacturer uses a pickup truck cab, documentation must be provided for the GVW of the donor truck. Full size pick-up trucks are limited to a maximum of 750 cid. Trucks based on Mid/Mini chassis are limited to a maximum of 500 cid. There are NO engine displacement class breaks; all vehicles shall compete against the same record.
Tyres shall be certified for vehicle weight and speed of the class record or minimum. Skid plates shall be designed and mounted to prevent any portion of the running gear from damaging the racecourse in the event of tyre failure. The skid plates shall NOT be designed to form a belly pan. Roll cages are mandatory and shall be mounted inside the cab. For other technical regulations, refer to other sections of this book.  Any fuel is allowed.
All vehicles entered in the DIESEL TRUCK category, shall have all flammable interior items removed where possible. For example, all floor coverings (including firewall), headliner, door panels, side and rear trim / upholstery. Door and side panels shall be replaced with non-flammable replacement. For example, aluminum panels. A stock dashboard may be retained or must be replaced with a fabricated non-flammable equivalent.

5.F.2 Modified Diesel Truck: /MDT

This class is for diesel-powered trucks only, with modified bodies not otherwise legal for Diesel Truck class.
The body may not be altered in height, width or length. Truck frame and running gear shall be used. Trucks shall have a GVW rating of 6577kg (14,500 lbs) or greater and have a minimum race weight of 6577kg (14,500 lbs) and are allowed unlimited engine displacement.  Full size pick-up trucks are limited to a maximum of 750 cid. Trucks based on Mid/Mini chassis are limited to a maximum of 500 cid. There are NO engine displacement class breaks. All vehicles shall compete against the same record.
Streamlining behind the cab such as elongated bed or similar body work, not to exceed the height of the stock bed, is allowed. Class 8 trucks may have any fairing between the wheels and frame covers not to extend above the top of the rear tyres or frame rail, whichever is higher. The body from the back of the cab forward shall not be altered in height, width or length.
Tyres shall be certified for vehicle weight and speed of class record or minimum. Skid plates shall be designed and mounted so as to prevent any portion of the running gear from damaging the racecourse in the event of tyre failure. The skid plates shall NOT be designed so as to form a belly pan. Streamlining devices are NOT allowed.
Roll cages are mandatory and shall be mounted inside of the cab.
This class shall use event diesel fuel. For other technical regulations refer to other sections of this book.

5.F.3 Highway Hauler: /HH2, /HH3 (2 axle / 3 axle)

American and foreign production diesel-powered trucks of not less than 6577kg (14,500 lbs). The truck shall be unaltered in height, width and contour with all stock panels mounted in the original relationship to each other. 
There are NO engine class breaks, and all vehicles shall compete against the same record.
A stock cab shall be used and be mounted in the original location with respect to the chassis. The cab shall be fitted with both driver and passenger seats and with a suitable roll cage.  Running boards and steps may be removed. Side mirrors may be removed.
Any diesel-fueled engine supplied by a diesel-engine manufacturer through normal channels may be used so long as the basic original design is retained.  The engine may be lowered a maximum of 10.16 cm (4 in.) and setback a maximum of 30.48 cm (12 in.) from the stock location. Only pure water is allowed for water injection systems. The water injection tank shall be inspected and sealed prior to each record run.
The stock fuel tanks may be removed or retained. The stock fuel tanks shall not contain flammable liquid or vapor. The only approved location for the in-use fuel tank is behind the cab, mounted securely between the frame rails.
The stock exhaust configuration and location shall be retained.  The muffler may be removed, but it shall be replaced by exhaust tubing.  Shortening of the exhaust system is not allowed.
Trucks shall be equipped with a fifth wheel pad mounted in the original location and with functional air and electrical connections for a trailer. Trucks shall be capable of hauling a trailer.
Trucks shall also be equipped with brake, tail and turn signal lights. Stock headlight housings shall be retained, but the glass may be removed.
In the three-axle class, either a drive axle or a tag axle may be used as the second rear axle.  In the case of a tag axle,
tyres shall bear against the surface of the racetrack.  The axle shall be available as a stock item for the truck used.
Wheels and tyres shall be appropriate for the weight and speed of the vehicle. Generally, the stock wheels and tyres, in excellent condition, will suffice. Wheels and tyres designed for heavy, commercial aircraft use are also appropriate and encouraged.
Skid plates shall be designed and mounted so as to prevent any portion of the running gear from damaging the racecourse in the event of tyre failure.  The skid plate shall not be designed so as to form a belly pan.
This class shall use event diesel fuel only.  Records are subject to approval and will be certified only after comparison with the manufacturer’s specifications for the model entered. The entrant is required to provide suitable documentation.
NOTE:  All entrants in the Diesel Truck Classes shall have equipment available to remove a disabled vehicle from the racecourse.

Diesel Truck: /DT

This class is for mid/mini and full-size diesel-powered pickup trucks of American or foreign manufacture. The body shall remain unaltered in height, width, and contour, with all stock panels mounted in original relationship to each other. Frame “clips” are allowed in front of and to the rear of the cab. The original frame shall be in place under the cab. Frame cross members may be moved, modified, replaced, or removed. Air dams (4. CC.1) are allowed. Removal of antenna, wipers, wiper motors, mirrors, trim moldings, and emblems are allowed. Any dashboard may be used. Roll cages are mandatory. Down bars are allowed. A radiator and/or intercooler shall be mounted behind the grille and be at least as large as the original intercooler or radiator opening. Any pre-'48 truck may have a 3-inch beauty chop. The firewall and cab floorboards / floor pan may be modified. If equipment is mounted in the truck bed, it must be lower than the bed rails and not extend thru the bed floor. Any ducting, hoses, etc. must be sealed to the bed to prevent air venting.
Engine swaps (4. N) are allowed. Maximum engine setback is 2% of the wheelbase. Driveline (trans and rear end) swaps are allowed. A driveshaft hoop for each section of the drive shaft is required. Front and rear suspension may be modified or replaced for ride height and/or handling. The wheelbase shall be stock. The stock frame shall be used with necessary reinforcement and modifications for suspension, engine and transmission mounts.
The exhaust may exit behind the cab above the low-pressure area, which for the rules is determined to be a line 45 deg. from the rear cab top extending to the top of the bed rail height. The pipe to floor and bed cap clearance shall be no greater than 1/8 inch to prevent venting of under truck air.
The covering of pickup beds with tarps or panels is allowed. The cover shall be no higher than the edge of the pickup bed. Aftermarket bed caps are allowed but shall not allow any aerodynamic advantage. Pickups may run with the tailgate raised, lowered or removed. All parachute packs shell be mounted below the bed rail level.

This class shall use Event Diesel Fuel, Section 2. B. Fuel may be tested.
Turbochargers and superchargers may be used; these engines will not be handicapped with class jump.
Engine classes allowed are AA, A, B, C, D, E, F, G and H

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ENGINE CLASS BREAK