
RRS Classes
Default Rules
If a class rule does not explicitly allow something, then it is NOT allowed. Higher classes are allowed everything lower classes are. Judges provide source material.
OEM
- Speakers can be replaced with same size or smaller aftermarket speakers
- If there is no OEM tweeter location, a 1 3/16” (30mm) or less (as defined cone diameter) tweeter may be added to an A-pillar. Installation must be flush mounted or using manufacturer mounting hardware. No large flange tweeters. OEM location must be used if there is one.
- External 12v specific processing allowed
- Can change double din to a single din
- Can add dampening and sound treatments not visible behind panels
- Commercial dash mats allowed
- Single cab trucks will allow sub enclosures under seat or against back walls
- Extended cab and crew cab will allow under back seat or against back wall
- Trunks may have house subwoofer enclosures or IB installation
OEM Mod
- Tweeters up to 1.5" (as defined by cone diameter) allowed in modified A-pillar or sail panel. Large flange tweeters allowed
- Kick panels up to 6.5” driver
- Any modifications under OEM locations can be made. (no grill changes)
- Oval drivers: 5x7 can be replaced with up to a 6.5”. 6x9 can be replaced with up to an 8”
Modified
- 25 square inches of dash corners may be modified for dash pods or dash openings
- A-Pillar may house up to a 4” driver(as defined by the cone diameter)
- Sail panel may house up to a 2" driver
- Metal cutting allowed
- Modified 110v processors allowed
- Seat rail extensions allowed
Unlimited
- Anything goes, your imagination is the limit as long as the vehicle is safe to operate and can drive into the lanes
King Of The Hill (KOTH)
- 1 seat, 2 seat and install
2 Seat
- OEM Through OEM Mod
Advanced 2 Seat
- Modified & Unlimited
2 seat scoring will be comprised of averaging the tonality from left and right seat, and adding everything else.