4 WD STREET STOCK 2.6 DIESEL CLASS REQUIREMENTS
The Street Stock 2.6 Diesel category is designed for streetable pickup trucks (full bodied diesel pickup trucks). Valid DOT registration and license plates are mandatory.
Class weight: 8000 lbs. with/including driver.
Engine: The engine is restricted to six cylinder and eight cylinder compression ignition engines. All vehicles must have an OEM engine. The engine must be governed to no more than 4800 RPM. Each vehicle must have recall tack, if over 4800 one warning will be issued, after that DQ with no points or money for that pull. Random checks will be performed by class tech officials. No sigma style injection pumps, no filled blocks. Intake modifications allowed and must run a stock appearing intercooler in stock location or no intercooler at all. No water.
Cooling: System: Radiators must be in the stock location and be of at least stock size. No electric water pumps permitted, must be an OEM water pump.
Exhaust: All vehicles must be equipped to direct exhaust upward. Two 3/8 inch diameter bolts must be placed in a cross pattern within one inch of each other as close to the turbo as is practical. Exhaust must exit behind cab-not through hood.
Fuel: The fuel must be pump #1/#2 diesel only. Soy/Bio Diesel fuel is permitted. No compressed gas of any kind allowed.
Fuel System: OEM fuel tank only.
Nitrous Oxide: Nitrous oxide is prohibited. No other oxygen extenders are allowed. No compressed gas of any kind is allowed. System components must be removed from the truck.
Propane: Propane is prohibited. System components must be removed from the truck.
Water Injection: Water injection is prohibited. System components, including after cooler spray bars and other mist systems, must be removed from the truck.
Turbocharger: The vehicle is limited to a 9-1/2" (maximum compressor diameter) single charger with 2.6" maximum inducer no bushings will be allowed”. Charger is a Single 2.60"(66mm) measured at the smallest diameter of the compressor wheel (will be measure with a go-no go gauge) and the housing must be smaller than 2.65"(measured with 2.65"plug) from the opening to the wheel(a minimum of 3/4" of inducer bore before the comp. wheel), no tapering of the inducer bore or plugs allowed. 1/4" Map groove maximum allowed and no other ways of allowing air to the wheel other than inducer bore and map groove are allowed. Turbo must remain in the factory location as manufactured by the OEM. The turbo may be raised or lowered to accommodate aftermarket pedestals. Must fit stock hood.
Transfer Case: Non-OEM transfer cases are prohibited. It must have been an option on a one-ton or smaller pickup truck.
Transmission: Automatic: Non-OEM transmissions are prohibited. Aftermarket torque converters, valve bodies and internal components are permitted. No manual clutch automatics will be allowed.
Transmission: Manual: Non-OEM transmissions are prohibited. Aftermarket internal components are permitted. All transmissions must be clutch-assisted
Rear Differential: Non-OEM differential housings are prohibited. It must have been an option on a one-ton or smaller pickup. Rear axle bolts must be covered by a cap or shield.
Brakes: Four wheel hydraulic brakes are mandatory.
Steering: The vehicle must retain the full original OEM steering gear.
Suspension, Front: The upper mounting point for strut assemblies must be in the factory location. Adjustable caster/camber pillow ball mounts are permitted. The lower control arm may be strengthened, provided factory-mounting points to chassis are maintained. The lower mounting point for the strut assembly may be modified for improved caster or camber, strut tower braces, lower tie bars, sway bars, and limit straps are permitted. Traction bars and suspension blocks are permitted; however, they must be bolt-on only; welds are permitted for attachment to frame or axle housing. Final decision rests with ITPA Executive Committee. No air assisted front shocks are allowed. All air compressor components must be removed.
Suspension, Rear: An OEM-style suspension is mandatory. Lowering or raising the vehicle height with suspension modifications is permitted. Raising the vehicle height with suspension modifications is limited to no more than four inches. Traction bars and suspension blocks are permitted; however, they must be bolt-on only; welds are permitted for attachment to frame or axle housing. Control arms may be strengthened or replaced, provided original mounting points are retained. Strut tower braces, lower tie bars, sway bars, limit straps, and camber kits are permitted. All rear suspensions must use at least one working shock absorber per wheel. Final decision rests with ITPA Executive Committee.
Weights: Hanging weights may not extend more than 60 inches from the centerline of the front axle.
Chassis: An OEM chassis with complete OEM floor pan and firewall is mandatory. Wheel tubs, back-half conversions, tube chassis, etc., are prohibited. The engine must be in the OEM location for the body used. The vehicle must retain the full factory frame.
Wheelbase: The vehicle must retain the original factory wheelbase.
Hitch: The hitch must be a "Reese"-style hitch mounted under the frame as to resemble a standard/factory hitch. The main cross bar of the hitch may not exceed 14 inches from the inside of the farthest point of the hook opening. The hook opening should be 3 3/4" to accommodate the new sled hooks and the "Reece" style hitch crossbar should not exceed 14" from the inside rear point of the hook opening or 10 1/4 inches from front of the hook opening. Trick hitches are prohibited. The hook point must be the rear most point on the vehicle. Roll pans are permitted. Hitch reinforcements are permitted and encouraged but all reinforcement must stay with in the confines of the Class 3 or 5 hitch. The hitch may be bolted or welded to the under side of the frame but as stated before, the reinforcements must stay with in the hitch when removed from the vehicle. The hitch must be horizontal to the ground and stationary in all directions. The hitch's height from the ground may not exceed 26 inches. The hooking point must have a minimum of 3 1/2 inch inside diameter opening for the new size sled hooks. Final decisions rest with the tech department.
Tires: Tires must be DOT street tires. Cut tires are prohibited.
Interior: A complete interior, including dashboard, door panels, headliner, etc., is mandatory. Two matching front seats are mandatory and must be upholstered. Removal of the back seat will be allowed. All factory controls (lights, signals, horn, windows, wipers, etc.) must be retained and be operative.
Body: The body must be an OEM truck body. It must retain full sheet metal and retain a stock appearing front end. Fiberglas is prohibited. This includes front bumper replacements. Aftermarket front bumpers must be steel and approved by tech dept.
Firewall: The OEM firewall is mandatory.
Floor: The OEM floor pan, front to rear, is mandatory.
Street Equipment: Complete headlight and taillight assemblies (all) are mandatory and must be operative. Complete OEM windshield and windows are mandatory. Windows must be operative per factory specifications; that is, they must open and close via electrical or OEM mechanical means. No removal of headlights is permitted. Hoods must remain fully closed during the pull and not on the safety latch.
Batteries: The batteries must be securely mounted. They must be in OEM location.
Fire Extinguisher System: A fire extinguisher is required. It must be securely mounted and at least 5 pounds in size.
Credentials: All drivers must have a valid driver’s license.
Driver Restraint System: The OEM restraint system is mandatory and must be worn.
Safety: All safety rules from ITPA general rules are applicable, especially the following:
27. All pulling vehicles will have a kill switch. Kill switch must kill engine and kill power to all electric fuel pumps. It must be located in the rear center area of the vehicle, maximum of 12 inches off center in either direction, 24 inches maximum above the point of hook. All trucks must have neutral start safety switch. If kill switch is pulled by other than sled operator, truck will be allowed to re-pull in original order, drop three positions, or last. Flagman and tech official from that class must verify the pulling of the kill switch by other than sled operator before the driver leaves the seat. If the driver leaves the seat, pull will be measured where the sled sits. If kill switch is pulled by the sled operator or for any other reason (accidents, etc.) and engine does not die, the truck is automatically disqualified.
31. All drivers must wear SNELL or SFI approved helmet.
32. All drivers must wear an SFI 3-2/1 approved fire jacket.
38. Vehicle must have SEMA approved scatter shields or blanket.
39. All automatic transmissions must have SEMA approved scatter blanket if above 4500RPM. All flywheels must be steel.
41. U-joint shields: 3 inches long of 1/4 inch thick steel or 3/8 inch thick aluminum. Also, three drive shaft loops per shaft, u-joint shield acts as one loop. Drive shaft loops must be minimum of 3/4 inch wide and 1/4-inch thick steel. All intermediate shafts must be fully enclosed 1/4" steel or 3/8" aluminum.
42. All rear ends, except planetaries, are required to have axle and hub shield.
44. Each truck must have a light located near the kill switch that comes on when the transmission is in reverse position.
44. Working OEM reverse lights are acceptable
