The work that went into developing the RS-4 muffler has paid big dividends in Off-road Racing; winning multiple Supercross and Motocross titles since it's inception. We've developed the current generation RS-4 based on that research & development, and the result is a unique design that provides an unrivaled combination of power and quiet exhaust tone. The RS-4 features a Polyresonant duplex chamber and two-staged stepped baffle for increased performance, while a carbon cone end cap finishes off its innovative styling.
- Pentagonal-shaped sleeve
- Front muffler cap functions as a polyresonant chamber which helps reduce noise
- Two-stage stepped baffle
- Carbon fiber end-cap
- Titanium header and tail-pipe
- Repack Kits, optional Inserts are available for all models
Sizing Charts by Brand (Under construction)
Please note: We're currently developing this feature to provide you with accurate and complete information around sizing.
Listed by brand (in alphabetical order). Here you can find up-to-date sizing charts. If you have further questions, or if we've missed something, reach out and our team can assist.
|6D Helmets||Airoh Helmets||Alpinestars|
|Arai Helmets||Asterisk||Atlas Braces|
|Five||Fly Racing||Fox Racing|
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