Yoshimura Race Series RS-4 Mufflers

Yoshimura's Race Series RS-4 mufflers were engineered using the same research and development that's been directed into their race-winning muffler design—a unique concept providing an unrivaled combination of power and a quiet exhaust note. The front cap design functions as a poly-resonant chamber, making for quieter mufflers with improved mid- to top-end power. Constructed with stainless steel sleeves, carbon fiber cones, and two-stage stepped baffles, Yoshimura conceived these exhausts with nothing but power in mind. Models are available for Honda® and Kawasaki applications.