Unlimited Truck SPEC 200 - 299
Unlimited chassis and suspension truck or SUV with limited engine.

Unlimited chassis and suspension truck or SUV with limited engine.
DEFINITION
Unlimited 4 wheel vehicles. Vehicles must have a production appearing Utility or Sports Utility body. Engines limited to approved sealed engines as supplied by American Off-Road Racing Championship engine suppliers. See American Off-Road Racing Championship engine builders list.
GENERAL REGULATIONS
Entrants in this class shall comply with all applicable general regulations.
TECHNICAL REGULATIONS
This class is an open class and all components will be considered open unless restricted herein.
NOTE: The TR abbreviations listed under this class (I.E. TR1 HELMETS) refer to TR cross reference listings in the front of this book. These TR cross-referenced listings are part of the class rules. Where a conflict occurs between the TR cross-referenced listing and a rule contained under this class, the rule contained under this class takes priority.
SAFETY EQUIPMENT
TR1 HELMETS
See TR1 in Car/Truck/Moto Technical Rules.
TR2 PROTECTIVE CLOTHING
See TR2 in Car/Truck/Moto Technical Rules.
TR3 EYE PROTECTION and DENTURES
See TR3 in Car/Truck/Moto Technical Rules.
TR4 HEAD AND NECK RESTRAINTS
See TR4 in Car/Truck/Moto Technical Rules.
TR5 FIRST AID KIT
See TR5 in Car/Truck/Moto Technical Rules.
TR6 EMERGENCY SIGNALING DEVICES
See TR6 in Car/Truck/Moto Technical Rules.
TR7 HORNS
See TR7 in Car/Truck/Moto Technical Rules.
TR8 REFLECTORS
See TR8 in Car/Truck/Moto Technical Rules.
TR9 FIRE SUPPRESSION EQUIPMENT
See TR9 in Car/Truck/Moto Technical Rules.
TR10 SURVIVAL SUPPLIES
See TR10 in Car/Truck/Moto Technical Rules.
SUSPENSION COMPONENTS
TR11 SHOCK ABSORBERS and BUMP STOPS
See TR11 in Car/Truck/Moto Technical Rules.
TR12 SECONDARY SUSPENSION
See TR12 in Car/Truck/Moto Technical Rules.
TR13 WHEELS and TIRES
See TR13 in Car/Truck/Moto Technical Rules.
TR14 FASTENERS
See TR14 in Car/Truck/Moto Technical Rules.
STEERING and BRAKE COMPONENTS
TR15 STEERING
See TR15 in Car/Truck/Moto Technical Rules.
TR16 BRAKES
See TR16 in Car/Truck/Moto Technical Rules.
ELECTRICAL SYSTEM
TR17 IGNITION
See TR17 in Car/Truck/Moto Technical Rules.
TR18 BATTERIES
See TR18 in Car/Truck/Moto Technical Rules.
TR19 LIGHTS
See TR19 in Car/Truck/Moto Technical Rules.
TR20 STARTERS
See TR20 in Car/Truck/Moto Technical Rules.
FUEL SYSTEM
TR21 FUEL
See TR21 in Car/Truck/Moto Technical Rules.
TR22 FUEL TANKS
Fuel cell mandatory.
TR23 FUEL FILLERS LINES, VENTS, and CAPS
See TR23 in Car/Truck/Moto Technical Rules.
ENGINE, TRANSMISSION and DRIVELINES
TR24 ENGINE and ENGINE DISPLACEMENT
Engine must be a GM LS525 (part number 19370413) or 525RLB (part number 19435005) 6.2 Liter or a Ford Ecoboost 3.5 liter V-6. All engines must be sealed and supplied by an American Off-Road Racing Championship Racing approved builder (see approved engine builder list).
Must use stock OEM fuel injector manifold. Complete intake assembly GM part number 19418251. Intake manifold GM part number 12686561. Throttle body GM part number 19420701. Fuel injectors GM part number 12576341. All parts must remain stock as delivered by the manufacturer.
The GM 525RLB 6.2 liter is delivered from GMC sealed. Seals cannot be removed, replaced, or tampered with. Valve covers must be sealed by the engine builder. Must run stock OEM intake manifold, fuel injectors, and throttle body. Fuel rails are open. Stock valley plate may be replaced or modified, to reverse the intake manifold.
The front drive including power steering pump, alternator, mechanical water pump, crank balancer are open. Pulleys and belts are open. Any stock oil pan may be used. Oil pan may be modified for fit. Must be resealed by an approved engine builder. No dry sump. Must use a stock production ecu. ECU may be reflashed.
This is a sealed motor class and the engine must be sealed by American Off-Road Racing Championship or one of its approved engine builders before it is installed into the vehicle.
If American Off-Road Racing Championship at any time during the racing season determines that any engine has an unfair advantage, we may equalize that engine either by a reduction in cc’s, restrictor sizing, turbo boost limits, etc. These changes may be required during the racing season.
TR25 ENGINE REPLACEMENT
See TR25 in Car/Truck/Moto Technical Rules.
TR26 TRANSMISSION/DIFFERENTIAL
Must use turbo 400 transmission. Any aftermarket replacement case may be used. Any under drive may be used.
TR27 THROTTLES
Fly by wire throttle pedals may be used.
TR28 EXHAUST
See TR28 in Car/Truck/Moto Technical Rules.
TR29 DRIVE SHAFTS
Straight axle, front engine only.
TR30 FLYWHEEL SHIELDS
See TR30 in Car/Truck/Moto Technical Rules.
TR31 FLUID COOLERS
See TR31 in Car/Truck/Moto Technical Rules.
TR32 AUXILIARY EQUIPMENT
See TR32 in Car/Truck/Moto Technical Rules.
TR33 SUPERCHARGERS and TURBOCHARGERS
See TR33 in Car/Truck/Moto Technical Rules.
VEHICLE SAFETY EQUIPMENT
TR34 ROLL CAGES
See TR34 in Car/Truck/Moto Technical Rules.
TR35 SAFETY HARNESS
See TR35 in Car/Truck/Moto Technical Rules.
TR36 SAFETY NETS
See TR36 in Car/Truck/Moto Technical Rules.
TR37 SEATING
GENERAL VEHICLE COMPONENTS
TR38 DRIVERS COMPARTMENT
See TR38 in Car/Truck/Moto Technical Rules.
TR39 DOORS AND LATCHES
See TR39 in Car/Truck/Moto Technical Rules.
TR40 FIREWALLS
See TR40 in Car/Truck/Moto Technical Rules.
TR41 BALLAST
See TR41 in Car/Truck/Moto Technical Rules.
TR42 WEIGHT
See TR42 in Car/Truck/Moto Technical Rules.
TR43 FLOORBOARDS
See TR43 in Car/Truck/Moto Technical Rules.
TR44 BUMPERS and HAZARDOUS PROTRUSIONS
See TR44 in Car/Truck/Moto Technical Rules.
TR45 MIRRORS
See TR45 in Car/Truck/Moto Technical Rules.
TR46 SKID PLATES
See TR46 in Car/Truck/Moto Technical Rules.
TR47 STORAGE
See TR47 in Car/Truck/Moto Technical Rules.
TR48 CHASSIS and BODY
Must maintain a production appearing utility or sports utility body.
Stock appearing grill and head light opening must be retained.
Body subject to American Off-Road Racing Championship approval.
TR49 HOSES
See TR49 in Car/Truck/Moto Technical Rules.
TR50 IDENTIFICATION MARKINGS
See TR50 in Car/Truck/Moto Technical Rules.
TR51 ADVERTISING on VEHICLES
See TR51 in Car/Truck/Moto Technical Rules.
TR52 RADIO EQUIPMENT
See TR52 in Car/Truck/Moto Technical Rules.
TR53 WORKMANSHIP
See TR53 in Car/Truck/Moto Technical Rules.
TR54 TRACKING DEVICE
See TR54 in Car/Truck/Moto Technical Rules.
2025 Mint 400
Brand | Category | Prize | 1st | 2nd | 3rd | Total | ||
---|---|---|---|---|---|---|---|---|
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Maxxis Tires | Tire Manufacturer | Cash | $1,000.00 | $500.00 | $300.00 | $1,800.00 | Requirements |
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Vision Wheel | Wheels | Cash | $750.00 | $500.00 | $250.00 | $1,500.00 | Requirements |
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FOX Shocks | Shocks | Cash | $10,000.00 | $0.00 | $0.00 | $10,000.00 | Requirements |
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MRT Tires | Tire Manufacturer | Cash | $3,000.00 | $2,500.00 | $2,000.00 | $7,500.00 | Requirements |
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Chevrolet | Vehicle Manufacturer | Cash | $10,000.00 | $5,000.00 | $3,500.00 | $22,000.00 | Requirements |
2025 Parker 400
Brand | Category | Prize | 1st | 2nd | 3rd | Total | ||
---|---|---|---|---|---|---|---|---|
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Maxxis Tires | Tire Manufacturer | Cash | $1,000.00 | $500.00 | $300.00 | $1,800.00 | Requirements |
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Vision Wheel | Wheels | Cash | $500.00 | $250.00 | $100.00 | $850.00 | Requirements |
2025 California 300
Brand | Category | Prize | 1st | 2nd | 3rd | Total | ||
---|---|---|---|---|---|---|---|---|
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Maxxis Tires | Tire Manufacturer | Cash | $1,000.00 | $500.00 | $300.00 | $1,800.00 | Requirements |
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Chevrolet | Vehicle Manufacturer | Cash | $10,000.00 | $5,000.00 | $3,500.00 | $22,000.00 | Requirements |
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Vision Wheel | Wheels | Cash | $500.00 | $250.00 | $100.00 | $850.00 | Requirements |
Unlimited Truck SPEC Drivers
2023 UNLTD Off-Road Racing Triple Crown Points Standings
Driver | 2023 King of the Hammers | 2023 BFGoodrich Tires Mint 400 | 2023 California 300 | Total | Position |
---|---|---|---|---|---|
Terry Householder | 113.00 | 180.00 | 250.00 | 543.00 | 1st |
Andre Laurin | 111.00 | 174.00 | 232.00 | 517.00 | 2nd |
Pat Gailey | 120.00 | 0.00 | 240.00 | 360.00 | 3rd |
Dustin Grabowski | 125.00 | 187.50 | 0.00 | 312.50 | 4th |
James Scully | 116.00 | 0.00 | 0.00 | 116.00 | 5th |