The Yoshimura RS-4 Titanium/Carbon Full System is pentagonal shaped muffler that features a carbon fiber cone end cap, two staged stepped baffle and striking good looks. A tapered header pipe design is used for optimal flow and performance. The RS-4 muffler features a new front cap design that functions as a polyresonant chamber. This design makes for a quieter muffler with improved mid to top end power. Comes complete with an AMA-approved sound insert installed in the muffler.
Front muffler cap functions as a polyresonant chamber which helps reduce noise.