8500# Hot Street Diesel Trucks
LOCKED FOR 2025
Safety 1) All General Truck Safety Rules apply.
Driveline/chassis/suspension
2) 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 prohibited.
3) Functional hydraulic brakes are mandatory front and rear.
4) 1 ton or smaller OEM type transmission and transfer case is mandatory. No
Drop boxes or reverser style transmission.
5) Front axle must be 1 ton or smaller, no fabricated housings. Blocks, stops,
or limiting straps are permitted. Traction bars and other like devices are
permitted. Lift kits are permitted.
6) Rear axle must be 1 ton or smaller, no fabricated housings. Suspension
blocks/stops from frame to axle allowed but must be removable, cannot be welded
solid or bolted to axle. Traction bars and other like devices are permitted. If
equipped with air bags, the compressor must be disconnected or valve stem to
bags removed. Air bags cannot be filled.
7) Must retain the original OEM power steering. Non OEM power assist methods are prohibited.
8) Tires must be DOT approved, 12” rim width max. No cutting or grooving. No chains. Front and rear tires must track no more than 5”of each other. Max tire size 35”x12.50”. Dual rear tires allowed, must be run on factory equipped dually trucks with accompanying dually rear beds. Dually trucks will be limited to 33”x12.50” tire size and 24” hitch height.
Body
9) Must use OEM truck body, including a full bed floor. The body must retain full sheet metal. Aftermarket hoods are permitted, no fiberglass. The hood must be closed and securely latched while the vehicle is hooked to the sled. The complete OEM firewall and OEM cab floor is mandatory.
10) Batteries must be securely mounted. No batteries in the cab or in front of the radiator core.
11) Radiators must be in the stock location and be of at least factory size for the specific model truck.
12) A complete interior, including factory dash, door panels, carpet/rubber floors, headliner, etc. is mandatory.Two factory front seats are mandatory and must be fully upholstered. The use of hand throttles is prohibited.
13) Complete headlight and taillight assemblies are mandatory and must be operative. Headlights cannot be on while hooked to the sled. Complete OEM glass windshield and windows are mandatory. Windows must be operative per factory specifications that is they must open and close via OEM electrical or mechanical means. All factory lights, signals, horn, windows, etc. must be retained and be operative.
14) OEM style fuel tank is mandatory. Fuel cells are not allowed.
15) Must have rear bumpers or rollpan.
16) Sled stops are recommended.
Weight/Hitch
17) Truck weight max 8500 LBS with driver. Trucks weighing less than 8500lbs are permitted to add additional ballast to meet the 8500lbs max weight. Any additional weight must be securely fastened on the truck, no weights in cab. Trucks weighing from the factory over 8500lbs can pull with a “grace” of up to 9000lbs. However, no additional weight ballast is permitted, and vehicle will be subject to 24” MAX hitch height. Any final decisions rest with the tech officials.
18) Hanging weight ahead of the front bumper is permitted on a removable style bracket with removable weights only, No boxes or permanently fixed brackets. Front bumper must be in the stock location.
19) Hitch must be a Reese style frame only mounted receiver type hitch and solid in all directions. No drawbar type hitches allowed. Hitch cannot protrude thru bed floor. Reinforcements of the frame permitted but must not extend forward of the centerline of rear axle or to the axle housing. Trick hitches are prohibited.
20) Max hitch height 26” at hook point. Hook point hole may not be more than 1 ½” from back edge of hitch and must have 3” wide by 3 ¾” long opening parallel to the ground. Hook may be no more than 1 ½” thick and no less than 1” thick. Hooking point must be no less than 44” back from the center of the rear axle. Hitch must be clearly accessible, bumpers or roll pans may be notched.
Engine/Turbo
21) The engine is limited to an OEM make-specific compression ignition engine available as an option in a 1 ton or smaller truck. The engine does not need to be OEM make specific to the chassis (I.E. Cummins in a Ford chassis is allowed). Filled engine blocks are prohibited. Aftermarket cast cylinder heads are allowed.
22) All trucks must have exhaust exit going upward and rearward of the truck cab. Exhaust exiting through the hood or the fender-well are prohibited. A 90 degree turn up pipe is required for exhaust exiting at the stock location/horizontal angle. Must have two 3/8” bolts that cross 1” apart from each other within 3” of the turbo outlet if running a bigger aftermarket turbo.
23) #1 or #2 diesel ONLY.
24) The use of multiple high pressure common-rail fuel pumps is permitted. The use of multiple HPOP’s in Ford Powerstroke is permitted. P7100 Pump max for mechanical systems. Mechanical injection pumps are recommended to have a mechanical fuel shut off.
25) NITROUS OXIDE, PROPANE INJECTION, AND WATER METHANOL ARE NOT PERMITTED. NO INJECTABLES OF ANY KIND ARE ALLOWED!
26) Aftermarket intake manifolds and turbo intakes are permitted. Air filters are not required. Intake piping to turbocharger may not extend outside the OEM body.
27) Air to air intercoolers and factory equipped air to water intercoolers (6.7 Powerstroke) are permitted. NO air to water intercoolers allowed on vehicles that did not come from the factory with them. Intercooler must be in the factory location. If the truck did not come with a factory intercooler, it must be mounted in front of the radiator and behind the grille.
28) All engines turning 4500rpm and higher must be equipped with a harmonic balancer or damper meeting SFI 18.1
29) Turbo must be no larger than 2.5 bore. WILL BE PLUGGED! All turbos and affixed piping must fit under the hood of the truck and may not extend outside of the factory body work. Cowl hoods are allowed and must be steel.
ALL THE ABOVE RULES WILL BE STRONGLY ENFORCED DUE TO YOUR SAFETY AND THE SAFETY OF OTHERS. THE OFFICIALS’ DECISIONS ARE FINAL!
**The Head of Class/Tech Official for each class will enforce all of the rules! Every vehicle will be teched on a random basis at some point throughout the season.*