Ballast is permitted. Hanging weights may not extend more than 60 inches from the centerline of the front axle.

Batteries must be securely mounted. They may not be located in the driver compartment.

The body may be any 3/4- or 1-ton full-sized pickup truck body. The body must retain full sheet metal. The full bed floor must remain intact. Alternatively, two one-hundred pound weights may be placed directly over the centerline of the rear axle in lieu of the bed floor. Metal after-market hoods are permitted. Fiberglass is prohibited. Tilt-bodies are prohibited. The hood must be closed and securely latched while the vehicle is hooked to the sled.

Front disk brakes are mandatory.

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, etc., are prohibited.

The OEM restraint system is mandatory and must be worn snugly. Alternatively, a three-inch-wide driver restraint system labeled as meeting SFI Spec 16.1 is permitted; this system includes a crotch strap and must be updated at two-year intervals from date of manufacture.

All trucks must have at least six inch wide u-joint shields around the rear u-joint constructed of at least 1/4 inch steel or 3/8 inch aluminum that will safely contain the u-joint and the ends of each shaft. In addition there will be at least one shaft loop in the middle of the drive shaft. All shields must be securely mounted to the vehicle. Any front shaft u-joint that is visible from the side of the truck must be shielded to contain the u-joint and the end of the shaft.

The engine block must have been available as a factory option on one-ton or smaller pickup trucks.

All vehicles must be equipped to direct exhaust upward. Two 3/8 inch diameter bolts must be placed in the exhaust pipe in a cross pattern within one inch of each other as close to the final turbo as is practical.

All trucks must be equipped with a driver operated fuel shutoff capable of blocking fuel flow to the injection pump. A three-way dump valve is recommended.

Drivers must wear a helmet meeting Snell 90, 95, 2000, K98 or SFI Spec 31.1 or 41.1 standards. The retention strap must be securely and snugly fastened The helmet must have the appropriate certification sticker affixed inside it.

The vehicle must be equipped with one seat for the driver; it must be properly installed.

On vehicles so equipped, all intermediate drive shafts must be fully enclosed with a 5/16-inch steel or 3/8-inch aluminum shield. The shield must cover the entire length of the shaft and the universal joints and yokes at each end.

A sled- and driver-operated spring-loaded emergency air shut off is mandatory. The cable must terminate into a two-inch diameter steel ring.

Drivers must wear a jacket meeting SFI specification 3.2A/5 or 3.2A/15. Protective clothing exceeding this specification is permitted. The protective clothing must be labeled with the proper SFI specification.

Rear axle bolts must be covered by a cap or shield.

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 devices are permitted. The final decision rests with the NSPA Technical Department.

Rigid or 4-link suspensions are permitted. Air suspension is permitted; the compressor must be disconnected.

Aftermarket torque converters, valve bodies and internal components are permitted. Transmission brakes are prohibited. Driveline brakes are permitted 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 running 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 tailhousing with a minimum six-inch overlap where it is fastened. All non-blanket type shields must incorporate two (or one, per manufacturer’s instructions) 3/4 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 running 4000 RPM or more and using an automatic transmission must be equipped with a flex plate meeting SFI Spec 29.1

A clutch meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles. All transmissions must be clutch assisted. Sequential shifters are prohibited. All vehicles equipped with a manual transmission must have a flywheel shield labeled as meeting minimum 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 bellhousing; it must be attached to the block and extend rearward to the transmission with a minimum six inch overlap where it is fastened.

Vehicles are limited to two turbochargers only. Single turbos are unlimited. For multiple turbos, the inducer bore on the atmosphere compressor housing(s) may be no larger than 3.2 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 inch long, mounted within 0.050 inch of the compressor wheel, and the inside diameter of the bushing may not exceed the 3.2 inch limit. If you have any questions regarding the construction of a bushing, contact NSPA Technical Services before the season starts. A stock map width enhancement (MWE) groove is permitted. No MWE groove may be wider than 1/4 inch. All provisions allowing air to the wheel other than via the bore and MWE grooves are prohibited. The inducer bore will be measured using a 3.25-inch plug.

Water injection is permitted. Alcohol, methanol, and all other flammables are prohibited. Commercially available pump lube is allowed.

The vehicle must retain the original unaltered factory wheelbase and track width. Front dual-wheel spacers may be used only with accompanying positive-offset dually-style wheels.