Pro Street 4 X 4 Diesel Trucks

1.      Class will run at 8000 lbs. Trucks must remain stock appearing. Must have upholstered interior. Factory mounted batteries.

2.     Maximum wheelbase permitted 158”.

3.     Maximum engine size will be 460 cubic inches. Engine must come from factory in one ton or smaller pickup truck. Engine must remain in stock location as intended by manufacturer.

4.     Hook point must be no closer than 48” of centerline of rear axle, hitch height maximum of 26”, with a minimum of a 3” opening. Hitch point must be easily accessed. No “trick” type hitches permitted. Hitch must be stationary in all directions.

5.     Vehicles are limited to 2 turbochargers only. Single turbos are unlimited. For multiple turbos, the inducer bore on the atmosphere compressor housing(s) may be no larger than 3.0 inches measured at the smallest diameter area of the compressor wheel. A bushing may be used to downsize the compressor housing ahead of the wheel. If a bushing is used, it must be round, at least 3/4 inches long, mounted within 0.050 inch of the compressor wheel, and the inside diameter of the bushing may not exceed 3.0 inch limit. The inducer bore will be measured using a 3.05 inch plug. All provisions allowing air to the wheel other than via the bore are prohibited.

6.     Exhaust must exit straight up, with (2) -3/8” inch bolts mounted in a cross pattern.

7.     No cast iron clutches or flywheels permitted.

8.     Fuel safety kill and/or air shutoff must be installed on rear of truck. Vehicle must have a manual fuel dump valve from the drivers compartment Kill switch will be securely mounted to the back of the vehicle and have a two (2) inch diameter ring to attach the sled.

9.     Fuel tanks must be securely mounted in bed of truck. No fuel lines may be inside of truck cab.

10. Computer chips and boxes permitted.

11.  Stock appearing injection pump required.

12. Mechanical or electronic fuel injection permitted.

13. Must be D.O.T. approved tire. Maximum tire height 35”. No studded tires or chains. No alteration to tires allowed. No bar or terra tires. Dual rear wheels are permitted.

14. Water injection permitted.

15. Front weights must be no more than 60” from the center line of the front axle to forward most point and be securely fastened. No rubber straps will be allowed to hold weights on vehicle

16. Fuel limited to Diesel fuel and Bio-diesel only. No alcohol, nitrous, propane or any oxygen enhancing agents allowed.

17. Drive train will consist of the following: Any front axle, any transfer case, any rear axle. No planetaries permitted.

18. Axle shields are required. Shield to be .060” thickness steel or aluminum. Shield not to be mounted to axle ends or hub bolts. A hole may be cut in one to allow locking in of hubs.

19. S.F.I Bell housing Blankets and/or S.F.I Blow proof Bell housings required

20. All drive shafts from engine/transmission to transfer case should be totally enclosed with no more than 1/4" visible (as on a national 4x4).360 degrees shields must be 3/8” thick aluminum or 5/16” thick steel. Shield will be 6 inches long minimum and centered on U-joint. Inside diameter of shield will no more than 2 inches larger than U-joint. 3 drive shaft loops will be mandatory on each drive shaft and be made of 5/16 steel or 3/8 aluminum

21.     Suspension modifications are permitted. Removable suspension blocks are permitted.

22.     Fire Extinguishers, helmets, and seatbelts required.  Fire Suite is recommended

23.     Trucks may be trailered to the event.