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R500: Modified 4500 - 4599

Modified

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Modified

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

Independent Suspended vehicles must use OEM Factory Frame and OEM Factory Body Style for that make/model year and the vehicle must have been Independent for that make/model year.

Pivot points are open.

TR11 SHOCK ABSORBERS and BUMP STOPS

Maximum Two (2) shocks per corner.

Maximum shock body outside diameter 2.65 inches (67mm).

Maximum shock stroke is fourteen (14) inches.

Shocks must mount to chassis and axle only, no linkage mounted shocks allowed.

TR12 SECONDARY SUSPENSION

See TR12 in Car/Truck/Moto Technical Rules.

TR13 WHEELS and TIRES

Maximum tire diameter is 37 inches.

Must be DOT.

TR14 FASTENERS

See TR14 in Car/Truck/Moto Technical Rules.

STEERING and BRAKE COMPONENTS

TR15 STEERING

Mechanical steering is required.

Hydraulic and electric power assist is allowed.

No full hydraulic steering allowed.

No rear steer allowed.

Steering must turn wheels lock to lock if the hydraulics are removed.

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 BATTERIES

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

See TR22 in Car/Truck/Moto Technical Rules.

TR23 FUEL FILLERS LINES, VENTS, and CAPS

See TR23 in Car/Truck/Moto Technical Rules.

ENGINE, TRANSMISSION and DRIVELINES

TR24 ENGINE and ENGINE DISPLACEMENT

Front engine only.

TR25 ENGINE REPLACEMENT

See TR25 in Car/Truck/Moto Technical Rules.

TR26 TRANSMISSION/DIFFERENTIAL

See TR26 in Car/Truck/Moto Technical Rules.

TR27 THROTTLES

See TR27 in Car/Truck/Moto Technical Rules.

TR28 EXHAUST

See TR28 in Car/Truck/Moto Technical Rules.

TR29 DRIVE SHAFTS

See TR29 in Car/Truck/Moto Technical Rules.

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

See TR37 in Car/Truck/Moto Technical Rules.

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 headlight opening must be retained.

Body subject to American Off-Road Racing Championship approval.

Stock frame, or boxed frame must run from the OEM motor mount location to behind the rearmost portion of the driver's seat seats.

Fabricated frames must be minimum 1.5” (38mm) x 3” (75mm) x 0.120” (3.0mm).

Fabricated frame rails must have an inside minimum measurement of sixteen (16) inches.

Independent Suspended vehicles must use OEM Factory Frame and OEM Factory Body Style for that make/model year and the vehicle must have been Independent for that make/model year.

Frame requirements will exceed class rules to include suspension mounting points for the independent portion of the suspension.

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.

4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599

2025 Mint 400
Brand Category Prize 1st 2nd 3rd Total
MRT Tires Logo MRT Tires Tire Manufacturer Cash $300.00 $200.00 $100.00 $600.00 Requirements
Maxxis Tires Logo Maxxis Tires Tire Manufacturer Cash $1,000.00 $500.00 $300.00 $1,800.00 Requirements
2025 Parker 400
Brand Category Prize 1st 2nd 3rd Total
Maxxis Tires Logo Maxxis Tires Tire Manufacturer Cash $1,000.00 $500.00 $300.00 $1,800.00 Requirements
2025 California 300
Brand Category Prize 1st 2nd 3rd Total
Maxxis Tires Logo Maxxis Tires Tire Manufacturer Cash $1,000.00 $500.00 $300.00 $1,800.00 Requirements

R500: Modified Drivers

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