leave 2.6 as it as... add a 2.5 class instead of work stock with rules like this.
• Weight: 8000lbs. weight with driver included.
• Ballast: Ballast is permitted. Hanging front weights are prohibited. Ballast may be used in the bed of the truck. If used, ballast must be securely mounted to the bed.
• Batteries: The batteries must be securely mounted. They may not be located in the driver’s compartment or forward of the radiator core support.
• Body: The body must be an OEM truck body, including the full bed floor. The body must retain full sheet metal. Metal aftermarket hoods are permitted. Fiberglass is prohibited. The hood must be closed and securely latched while the vehicle is hooked to the sled. The complete OEM firewall and complete OEM floor pan is mandatory.
• Brakes: Four-wheel hydraulic brakes are mandatory.
• Chassis: The OEM chassis is mandatory. The engine must be in the OEM location for the body used. The vehicle must retain the full OEM chassis. Wheel tubs, back-half conversions, tube chassis, ect., are prohibited.
• Cooling System: Radiators must be in the stock location and be of at least stock size.
• Credentials: All drivers must have a valid state driver’s license.
• Driveline: An OEM transmission and transfer case is mandatory. They must have been an option on a one-ton or smaller pickup.
• Drivers Restraint System: The OEM restraint system is mandatory and must be worn.
• Driveshaft Loops: All trucks must have at least six inch wide u-joint shields around the rear u-joint constructed of at least ¼ STEEL OR 3/8 ALUMINUM that will safely contain the u-joint and the end of the rear shaft. All shields must be securely mounted to the vehicle. All front shaft u-joints that are visible from the side of the truck must be shielded to contain the u-joint and the end of the shaft.
• Engine: The engine is limited to a stock-appearing, OEM make-specific compression ignition engine.
• Exhaust: All vehicles must be equipped to direct the exhaust upward. The exhaust must exit rearward of the drivers compartment. Stacks exiting through the hood or fender well are prohibited. Two 3/8 inch diameter bolts must be installed through the exhaust pipe in a cross pattern within one inch of each other as close to the turbo as is practical.
• Fire Extinguishing System: A fire extinguishing system is permitted. It must be securely mounted.
• Fuel: The fuel must be pump #1 or #2 diesel only. Soy/Bio-diesel fuel is permitted. Off-road diesel fuel is prohibited.
• Fuel Injection Pump: The fuel injection pump is limited to a stock-appearing, OEM engine make-specific pump only. The use of multiple high-pressure common-rail fuel pumps is prohibited. Powerstoke engines with a single factory turbo may utilize a second HPOP. Pumps from different years in the same engine model may be interchanged.
• Fuel System: The OEM fuel tank is mandatory and must be used. Racing fuel cells are prohibited and must be removed from the truck.
• Harmonic Balancer: All engines turning 4500 RPM and higher must be equipped with a harmonic balancer or damper meeting SFI spec 18.1.
• Hitch: The hitch must be a receiver-style hitch; Reinforcements are permitted. Reinforcements must not extend forward of the centerline of the rear axle. Trick hitches are prohibited. The hooking point must be the rear-most point on the vehicle and must be rearward of the stock location of the tailgate. The hitch must be horizontal to the ground and stationary in all directions. Bumpers may not be notched or removed. The hitch’s height may not exceed 26 inches. The hooking point must have a minimum 3.750-inch inside diameter opening for the sled hook. The hooking point will be measured to the center of the clevis loop.
• Interior: A complete interior, including dashboard, door panels, headliner, ect., is mandatory. Two matching front seats are mandatory. Aftermarket seats are permitted; they must be fully upholstered. All factory controls (lights, signals, horn, windows, wipers, ect.) must be retained and be operative. The use of hand-throttle controls is prohibited.
• Rear End: Non-OEM rear-ends housings are prohibited. The rear end must have been an option on a one-ton or smaller pickup. Rear axle bolts must be covered by a cap or shield.
• Steering: The vehicle must retain the full, OEM steering gear. The vehicle must retain the original OEM power steering assistance, if it were so equipped. Additional stabilizers are permitted. Non-OEM power assist methods are prohibited.
• Street Equipment: Complete headlight and taillight assemblies (all) are mandatory and must be operative. Complete OEM windshields and windows are mandatory. Windows must be operative per factory specifications; that is, they must open and close via OEM electrical or mechanical means.
• Suspension Front: The upper mounting point for strut assemblies must be in factory location. Adjustable caster/camber pillow ball mounts are permitted. The lower control arm may be strengthened providing 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 devices are permitted.
• Suspension Rear: An OEM-style suspension is mandatory. Lowering or raising the vehicles height with suspension modifications is permitted. Traction bars and devices are permitted; they must be bolt on only; welds are permitted for attachment to frame or axle housing. Control arms may be strengthened or replaced, provided all original mounting points are retained. Strut tower braces, lower tie bars, sway bars, limit straps, and camber kits are permitted. The rear suspension must allow at least one inch of travel. All rear suspensions must use at least one working shock absorber per wheel.
• Tires: The tires must be DOT street tires. Cuts are prohibited.
• Tow Vehicles: Tow vehicles are prohibited.
• 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 converters, valve bodies and internal components are permitted. Transmission brakes are prohibited. Any non-OEM floor-mounted automatic transmission shifter must be equipped with a spring-loaded positive reverse lockout device to prevent the shifter from accidentally being put into reverse gear. A functional neutral safety switch is mandatory. All transmission lines must be metallic or high-pressure-type hose. All vehicles with engines turning 4500 RPM or more and using an automatic transmission must be equipped with a transmission shield meeting SFI spec 4.1 and must be labeled accordingly. A blanket-type shield is permitted; it must be appropriately labeled as meeting SFI spec 4.1 and it must extend from the rear of the block to the front of the tail housing with a minimum six-inch overlap where it is fastened. All non-blanket-type shields must incorporate two (or one, per manufactures instructions) ¾ inch by 1/8 inch straps that bolt to the shield on each side and pass under the transmission pan unless the transmission pan is labeled as meeting SFI spec 4.1. All vehicles with engines turning 4500 RPM or more and using a automatic transmission must be equipped with a flex plate meeting SFI spec 29.1 and be covered by a flex plate shield meeting SFI spec 30.1.
• Transmission Manual: Non-OEM transmissions are prohibited. Aftermarket internal components are permitted. A clutch meeting minimum SFI spec 1.1 or 1.2 is mandatory on all vehicles with engines running 4500 RPM or more. All manual transmissions must be clutch assisted. Sequential shifters are prohibited. All vehicles with engines running 4500 Rpm or more and equipped with a manual transmission must have a flywheel shield labeled as meeting SFI spec 6.3 or greater. Applications for which an SFI spec flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blanket that completely covers the bell housing; it must be attached to the block and extended rearward to the transmission with a minimum six inch overlap where it is fastened.
• Turbocharger: The turbocharger is limited to a direct bolt on. No adapter plates allowed. T4 foot limit. With an inducer bore of 2.5 limit,with 1/8'' protrusion. measured with a 2.55 plug with zero tolerance. 6.4 liter powerstroke engines may utilize the factory compound-turbo configuration.
• Water Injection: Water Injection is prohibited. All system components must be unplugged or removed from the truck. Nitrous Oxide is prohibited along with other oxygen extenders and the use of Propane is also prohibited. All system components must be unplugged or removed from the truck.
• Wheelbase: The vehicle must retain the original factory wheelbase and track width. No dual wheels on single wheel trucks allowed.
