Two Stroke Silencers & Spark Arrestors

The work that went into developing the RS-4 muffler design paid big dividends in 2010 with Ryan Dungey winning the AMA 450 Supercross and Motocross Championship series as a rookie in the same year, and again in 2012 with the Yoshimura-backed GEICO...

* Deliver huge power at a very light weight * Offer better handling thanks to a lower centralized mass coefficient * Full systems feature header and mid-pipe that are stainless steel construction * Slip-on mufflers feature stainless steel mid-pipe *...

* Deliver huge power at a very light weight * Offer better handling thanks to a lower centralized mass coefficient * Full systems feature header and mid-pipe that are stainless steel construction * Slip-on mufflers feature stainless steel mid-pipe *...