Stock Production Truck Full 850 - 899
Stock Production Full size truck or SUV
Stock Production Full size truck or SUV
Last Updated April 10, 2024
DEFINITION
Vehicles built from a full sized 2 or 4 wheel drive utility or SUV type vehicle. Vehicle must have been series produced in quantities of at least 5000 units within a 12-month period and be readily available to the general public in the U.S.A. Vehicle must be marketed as full size. Vehicle must be currently produced within the last five(5) model years.
GENERAL REGULATIONS
Entrants in this class shall comply with all applicable general regulations.
TECHNICAL REGULATIONS
Manufacturer’s body, engine, transmission, differentials, and chassis combinations must be retained. This class is a stock production class and all components must remain stock except those modifications allowed herein. If the rules herein don’t say that you can do it, you CAN’T do it and it will be deemed illegal. No predating or postdating of any component allowed unless offered by the manufacture as a direct replacement part.
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
TR2 PROTECTIVE CLOTHING
TR3 EYE PROTECTION and DENTURES
TR4 HEAD AND NECK RESTRAINTS
TR5 FIRST AID KIT
TR6 EMERGENCY SIGNALING DEVICES
TR7 HORNS
TR8 REFLECTORS
TR9 FIRE SUPPRESSION EQUIPMENT
TR10 SURVIVAL SUPPLIES
SUSPENSION COMPONENTS
Front and rear suspension must be of the same manufacture, shape, size and configuration as originally produced and installed on the chassis to which it is mounted. All suspension components will remain in the original stock locations and original stock mounting methods maintained. All components will be original manufacturer’s design and must be stock as delivered from the manufacturer. No material may be added. No reinforcement of stock pivot points.
Aarms, Ibeams, and front axles must remain stock as delivered on the chassis to which it is mounted. Suspension parts must remain stock shape, size, and configuration as delivered from the manufacturer. Stock pivot points must be retained. Front and rear springs must remain in stock locations and retain original stock concept (leaf, coil, torsion). Rates and capacities of springs are open. Stock front and rear track must be retained plus or minus(+or-) one(1) inch.
TR11 SHOCK ABSORBERS and BUMP STOPS
One (1) shock per wheel, mounted in stock location as delivered by the manufacturer is allowed.
Shock body limited to a 3.5 inch maximum diameter. Must be productions shocks readily available to the general public only.
No air shocks allowed.
Stock production dump stops as installed by the manufacture only.
TR12 SECONDARY SUSPENSION
Secondary suspension not allowed.
TR13 WHEELS and TIRES
Wheels and wheel studs may be of any manufacture.
Maximum tire size 37 inches. DOT tires only.
TR14 FASTENERS
Fasteners must remain stock material. Any fastener may be upgraded with steel grade 8.
STEERING and BRAKE COMPONENTS
TR15 STEERING
Steering box must remain stock as delivered from the manufacturer. Steering box must be mounted in the stock location.
Steering parts (tie rods, tie rods ends, idler arms, pitman arms, relay rods and turning arms) must remain stock as delivered from the manufacturer.
Stock power steering pump as delivered by the manufacture in the stock location only.
Any manufacturer’s steering wheel may be used. Stock steering shaft may be replaced.
TR16 BRAKES
Turning or steering brakes are not allowed.
Brake calipers, rotors, master cylinders must remain stock as delivered by the manufacturer. Brake pads are open.
ABS maybe be removed or disconnected.
Brake lines may be modified or replaced.
ELECTRICAL SYSTEM
TR17 IGNITION
All electronics must remain stock. Wiring may be added for aftermarket components( lighting, radio, GPS, etc).
TR18 BATTERIES
Battery of any manufacture in any location allowed.
TR19 LIGHTS
Stock head and tail lights must be retained in working condition at all times.
Rearward facing amber and blue lights are required.
Any manufacture additional lights may be used.
TR20 STARTERS
FUEL SYSTEM
TR21 FUEL
TR22 FUEL TANKS
TR23 FUEL FILLERS LINES, VENTS, and CAPS
Fuel cell mandatory.
Fuel cell must be mounted on top of bed floor. Minimum size hole for fuel lines may be cut in bed floor.
Fuel cell capacity limited to 44 gallons maximum.
ENGINE, TRANSMISSION and DRIVELINES
TR24 ENGINE and ENGINE DISPLACEMENT
Any engine delivered in, or offered as an option by the manufacturer may be used.
Engine must remain stock as delivered by the manufacturer.
Engine must remain in the stock location, using stock engine mounts.
Air cleaner must remain stock.
Fuel pumps must remain stock as delivered my manufacture.
Exhaust must remain stock as delivered by the manufacturer.
All smog equipment must remain as delivered.
TR25 ENGINE REPLACEMENT
TR26 TRANSMISSION
Transmission must remain as delivered by the manufacture or be a factory replacement for model year of the vehicle.
Any shifter may be used.
DIFFERENTIALS
Front and rear differentials must remain stock as delivered by the manufacturer. Gear ratios and carriers are open. Front and rear straight axle differentials may have material added for strengthening purposes only. IFS differentials (traction beam, etc.) may not add material for any reason. IFS may use a bolt on skid plate to protect the front differential housing only. The skid plate may not reinforce the differential in any way.
TR27 THROTTLES
TR28 EXHAUST
TR29 DRIVE SHAFTS
TR30 FLYWHEEL SHIELDS
TR31 FLUID COOLERS
Radiator must remain in stock location.
Stock coolers only. No additional cooler may be used.
TR32 AUXILIARY EQUIPMENT
TR33 SUPERCHARGERS and TURBOCHARGERS
Only vehicles delivered with forced induction from the manufacture are allowed force induction.
All forced induction components( turbochargers, inner coolers, etc) must remain stock as delivered from the manufacturer.
VEHICLE SAFETY EQUIPMENT
TR34 ROLL CAGES
TR35 SAFETY HARNESS
TR36 SAFETY NETS
TR37 SEATING
GENERAL VEHICLE COMPONENTS
TR38 DRIVERS COMPARTMENT
Dash and related components must retain stock. Minimum size holes may be cut for roll cage installation.
Aftermarket gauges in any location may be used.
Air conditioning and heating units may be removed.
Door panels, headliners, visors, rear seats, and carpets may be removed. Stock pedals in the stock locations are required.
TR39 DOORS AND LATCHES
Doors must remain stock and operate on stock hinges as delivered from the manufacturer. Positive latching secondary door latches are required.
Windows and roller assemblies must remain in their stock location.
TR40 FIREWALLS
Stock firewalls must be retained as delivered from the manufacture. Holes allowing for the routing of fluid lines, electrical, and roll cage must be keep to a minimum. Holes must be drilled to minimize the area open around the item penetrating the firewall.
TR41 BALLAST
TR42 WEIGHT
Minimum weight must be retained. Minimum weight is curb weight as delivered and stated by the manufacturer.
TR43 FLOORBOARDS
TR44 BUMPERS and HAZARDOUS PROTRUSIONS
Stock unmodified bumpers required.
Bush guards and lights may be attached to the bumper.
TR45 MIRRORS
TR46 SKID PLATES
TR47 STORAGE
TR48 CHASSIS and BODY
Manufacturer's body chassis combinations must be retained. No predating or updating chassis or bodies.
Fender openings must remain stock. Inner fender panels may be removed.
Frame must remain stock as delivered. No removal or adding of material.
Body must retain stock shape, size, appearance and configuration. Additional material or mounts for body strengthening is allowed. Mounting location (vertical, horizontal, and lateral) must remain stock in relationship to the frame and must retain stock mounting method. The measurement from the back of the b-pillar post to the centerline of the front spindle must remain stock.
Internal body structural members must remain intact. Holes may be placed for the placement of roll cage, fluid lines, or electrical.
Pickup bed floors must remain intact. Minimum size holes maybe cut for roll cage installation.
Hoods, trunk lids, doors, and bedsides must remain stock as delivered by the manufacturer.
Tailgates are optional. Hoods, fenders, and tailgates may be upgraded to the latest available update for that series of vehicle body and chassis combination.
Stock front grill and headlight assemblies are required.
Safety glass windshields, rear and side glass must be retained.
TR49 HOSES
TR50 IDENTIFICATION MARKINGS
Unlimited Off-Road Racing will assign race numbers.
