UTV Pro Stock Modified Z1 - Z999
Maximum engine size: 2000cc NA, 1000cc Turbo
Maximum engine size: 2000cc NA, 1000cc Turbo
DEFINITION
One or two seat vehicles built using a one, two or four seat production UTV.
Maximum engine size 2000cc NA, 1000cc Turbo.
Any manufacturer UTV may be used providing the model used has been series produced in a minimum of 1000 units within a twelve (12) month period.
Any manufacturer UTV may be used providing the model used has been series produced in a minimum of 1000 units within a twelve (12) month period.
Stock production body parts required.
GENERAL REGULATIONS
Entrants in this class shall comply with all applicable general regulations.
TECHNICAL REGULATIONS
This class is a Stock Production class, and all components will be considered Stock Production unless unrestricted herein. If the rules herein don’t say that you can do it, you CAN’T do it and it will be deemed illegal. Manufacturers body, engine, transmission, chassis, and drive train components must be retained.
NOTE: The UTR abbreviations listed under this class (I.E. UTR1 HELMETS) refer to UTR cross reference listings in the front of this book. These UTR cross-referenced listings are part of the class rules. Where a conflict occurs between the UTR cross-referenced listing and a rule contained under this class, the rule contained under this class takes priority.
SAFETY EQUIPMENT
UTR1 HELMETS
See UTR1 in UTV Technical Rules.
UTR2 PROTECTIVE CLOTHING
See UTR2 in UTV Technical Rules.
UTR3 EYE PROTECTION and DENTURES
See UTR3 in UTV Technical Rules.
UTR4 HEAD AND NECK RESTRAINTS
See UTR4 in UTV Technical Rules.
UTR5 FIRST AID KIT
See UTR5 in UTV Technical Rules.
UTR6 EMERGENCY SIGNALING DEVICES
See UTR6 in UTV Technical Rules.
UTR7 HORNS
See UTR7 in UTV Technical Rules.
UTR8 REFLECTORS
See UTR8 in UTV Technical Rules.
UTR9 FIRE SUPPRESSION EQUIPMENT
See UTR9 in UTV Technical Rules.
UTR10 SURVIVAL SUPPLIES
See UTR10 in UTV Technical Rules.
SUSPENSION COMPONENTS
Track Width: Stock track width, as delivered by the manufacturer, must be retained plus or minus two inches, with a maximum of 83". Measured outside of tire to outside of tire at ride height, at its widest point.
Wheelbase: Stock, as delivered by the manufacturer, plus or minus two inches.
Pivot Points: Suspension pivot points may be reinforced or replaced, but must remain in the stock location as delivered by the manufacturer. All pivot points will be used as designed by the manufacturer. No pivot points may be added or removed.
Suspension Components (Suspension components, A-arms, spindles, links, bushings, etc): Stock. Aftermarket arms allowed with stock dimensions
Ball Joints: Ball joints may be of any manufacturer.
Sway Bars: Stock, as delivered by the manufacturer, or can be removed.
Sway Bar Links: Open.
Radius/Tie Rods: Aftermarket radius/tie rods may be used, but stock length must be retained.
Hubs & Wheel Bearings: Open.
Axles/CV Joints: Open.
UTR11 SHOCK ABSORBERS and BUMP STOPS
Limited to one shock per wheel.
No external bypass shocks.
Shocks may be of any manufacturer, but must mount in the stock location, as delivered by the manufacturer.
UTR12 SECONDARY SUSPENSION
Not allowed.
UTR13 WHEELS and TIRES
Wheel diameter is sixteen (16) inch maximum.
Maximum tire size is 35x10.5.
Wheel studs are open.
UTR14 FASTENERS
See UTR14 in UTV Technical Rules.
STEERING and BRAKE COMPONENTS
UTR15 STEERING
Power Steering: Stock, as delivered by the manufacturer.
Steering / Turning Brakes: Not allowed.
Steering Box: Stock, as delivered by the manufacturer.
Knuckles: Stock, as delivered by the manufacturer.
Spindles: Stock, as delivered by the manufacturer.
Center Steering: Allowed only on single seat vehicles.
Steering Tie Rods: Open.
Steering Wheel: Open.
UTR16 BRAKES
Brake calipers must remain stock, as delivered by the manufacturer.
Rotors are open.
ELECTRICAL SYSTEM
UTR17 IGNITION
Coils, alternator, stator and voltage regulators must remain stock, as delivered by the manufacturer.
UTR18 BATTERIES
See UTR18 in UTV Technical Rules.
UTR19 LIGHTS
See UTR19 in UTV Technical Rules.
UTR20 STARTERS
Stock, as delivered by the manufacturer.
FUEL SYSTEM
Pressurized fuel systems not allowed. Gravity fueling, dump cans or fuel towers only.
UTR21 FUEL
See UTR21 in UTV Technical Rules.
UTR22 FUEL TANKS
Stock tank in stock location as delivered by the manufacturer or fuel cell in any location.
Maximum fuel capacity is 20 gallons.
Racers with larger than 20 gallon fuel cells: Due to the unification of Best in the Desert and Unlimited Off-Road Racing, fuel cell capacities within this class have varied across rulebooks. To ensure parity, all vehicles are now limited to a maximum usable fuel capacity of 20 gallons.
Competitors with fuel cells exceeding 20 gallons must use displacement blocks in their fuel cell to reduce total capacity to the allowable limit.
Fuel capacity will be verified during post-race technical inspection by draining the tank and refilling the cell to confirm total capacity does not exceed 20 gallons.
UTR23 FUEL FILLERS LINES, VENTS, and CAPS
See UTR23 in UTV Technical Rules.
ENGINE, TRANSMISSION and DRIVELINES
UTR24 ENGINE and ENGINE DISPLACEMENT
Engine: Engine must remain stock, as delivered by the manufacturer. Engine must remain in the stock location. No engine parts may be modified or replaced.
Engine Displacement: Maximum engine size 2000cc NA, 1000cc Turbo.
Air Cleaners: Open.
Air Cleaner Tubes: Open.
Fuel Injectors: Stock, as delivered by the manufacturer.
Clutches: Stock, as delivered by the manufacturer.
Fuel Pumps: Open.
Fuel Regulators: Open.
Fuel Filters: Open.
Fuel Rails: Open, must be made of metal.
Springs & Weights: Open.
Clutch housing cooling inlet and outlet tubes (snorkels): May be modified or replaced.
Differentials: Stock, as delivered by the manufacturer.
Sheaves, Sliders, Rollers: Stock, as delivered by the manufacturer.
Clutch Ducting: Open.
ECU: Stock ECU must be retained, as delivered by the manufacturer. Tuning allowed.
Intake Ducting: Open.
Boost Tube: Stock, as delivered by the manufacturer.
Intake Tube: Stock, as delivered by the manufacturer.
BOV: Stock, as delivered by the manufacturer.
UTR25 ENGINE REPLACEMENT
See UTR25 in UTV Technical Rules.
UTR26 TRANSMISSION/DIFFERENTIAL
Transmission/Gear Box Cases: Stock, as delivered by the manufacturer.
Reverse Gear Function: All vehicles are required to have a functional reverse gear.
Differential Cases: Front and rear differential cases must remain stock, as delivered by the manufacturer.
Side Covers: Open.
Axle Flanges: Open.
Bearings: Bearings may be changed, but must be stock dimensions, as delivered by the manufacturer. No ceramic or hybrid bearings allowed.
Retainer Plate: Use of a retainer plate is allowed.
High Gear Spacers: High gear spacers are allowed.
UTR27 THROTTLES
Stock, as delivered by the manufacturer.
UTR28 EXHAUST
Stock header must be used, as delivered by the manufacturer.
Open bolt on muffler.
UTR29 DRIVE SHAFTS
Stock, as delivered by the manufacturer.
UTR30 FLYWHEEL SHIELDS
See UTR30 in UTV Technical Rules.
UTR31 FLUID COOLERS
Open
UTR32 AUXILIARY EQUIPMENT
See UTR32 in UTV Technical Rules.
UTR33 SUPERCHARGERS and TURBOCHARGERS
Turbochargers and their components must remain stock, as delivered by the manufacturer.
VEHICLE SAFETY EQUIPMENT
UTR34 ROLL CAGES
See UTR34 in UTV Technical Rules. Stock OEM cages are not allowed.
UTR35 SAFETY HARNESS
See UTR35 in UTV Technical Rules.
UTR36 SAFETY NETS
See UTR36 in UTV Technical Rules.
UTR37 SEATING
Race seats only. All stock seats must be removed.
GENERAL VEHICLE COMPONENTS
UTR38 DRIVER'S COMPARTMENT
Stock firewall subject to American Off-Road Racing Championship approval.
OEM dashes and stock plastic interior required.
Any gauges, switches, GPS are allowed.
UTR39 DOORS AND LATCHES
Doors must be securely closed (welded, approved secondary latches, hose clamps, etc..).
UTR40 FIREWALLS
See UTR40 in UTV Technical Rules. OEM firewall with OEM fuel tank acceptable. Stock firewall subject to American Off-Road Racing Championship approval.
UTR41 BALLAST
See UTR41 in UTV Technical Rules.
UTR42 WEIGHT
See UTR42 in UTV Technical Rules.
UTR43 FLOORBOARDS
See UTR43 in UTV Technical Rules.
UTR44 BUMPERS and HAZARDOUS PROTRUSIONS
See UTR44 in UTV Technical Rules.
UTR45 MIRRORS
See UTR45 in UTV Technical Rules.
UTR46 SKID PLATES
See UTR46 in UTV Technical Rules.
UTR47 STORAGE
See UTR47 in UTV Technical Rules.
UTR48 CHASSIS and BODY
Chassis/Body: Stock, as delivered by the manufacturer. The bed box may be modified or removed.
Lower Frame Rail: Open.
Frame Rail Reinforcement: Frame rails may be reinforced, but stock length and width must be retained, as delivered by the manufacturer.
Approval: All frames and bodies subject to Unlimited Off-Road Racing approval.
Roof: Roof must be covered with sheet metal .060 thick minimum.
Seats: Two (2) or four (4) seat chassis are allowed.
Additional Tubes & Gussets: Additional tubes and gussets are allowed if approved by American Off-Road Racing Championship tech before construction.
Body Components: Stock grill, dash, hood, front fenders and rear fenders must be used, as delivered by the manufacturer.
UTR49 HOSES
See UTR49 in UTV Technical Rules.
UTR50 IDENTIFICATION MARKINGS
See UTR50 in UTV Technical Rules.
UTR51 ADVERTISING on VEHICLES
See UTR51 in UTV Technical Rules.
UTR52 RADIO EQUIPMENT
See UTR52 in UTV Technical Rules.
UTR53 WORKMANSHIP
See UTR53 in UTV Technical Rules.
UTR54 TRACKING DEVICE
See UTR54 in UTV Technical Rules.
2025 Mint 400
| Brand | Category | Prize | 1st | 2nd | 3rd | Total | ||
|---|---|---|---|---|---|---|---|---|
|
Maxxis Tires | Tire Manufacturer | Cash | $750.00 | $500.00 | $350.00 | $1,600.00 | Requirements |
|
FOX Shocks | Shocks | Brand Credit | $250.00 | $0.00 | $0.00 | $250.00 | Requirements |
|
MRT Tires | Tire Manufacturer | Cash | $3,000.00 | $2,500.00 | $2,000.00 | $7,500.00 | Requirements |
2025 Parker 400
| Brand | Category | Prize | 1st | 2nd | 3rd | Total | ||
|---|---|---|---|---|---|---|---|---|
|
|
Maxxis Tires | Tire Manufacturer | Cash | $750.00 | $500.00 | $350.00 | $1,600.00 | Requirements |
2025 California 300
| Brand | Category | Prize | 1st | 2nd | 3rd | Total | ||
|---|---|---|---|---|---|---|---|---|
|
|
Maxxis Tires | Tire Manufacturer | Cash | $750.00 | $500.00 | $350.00 | $1,600.00 | Requirements |
