All Classes
- Must be 2WD
- Can flip the front kingpins over
Box Stock
Car must be unmodified from out of the box MR-O3 chassis with the ONLY exceptions as follows:
- Only Alkaline or NiMh AAA batteries
- Can use any Kyosho brand t-plate
- Can use any Kyosho front springs
- Can use any Kyosho rubber tire (no foam tires)
Super Stock
Rules are the same as Box Stock with these modifications allowed:
- Can use a ball diff (any manufacturer)
- Open gear ratio
Modified
Rules are the same as Box Stock with these modifications allowed:
- Only Alkaline, NiMh, or Lithium AAA batteries
- Open brushless motor
- Can use the Evo chassis
