Yoshimura R77D Carbon Fiber Slip-On Exhaust System - Suzuki GSX-R600 2011 The all new R-77D muffler has been developed throughout years of racing efforts, and hours of meticulous research and development by Yoshimura engineers. Superbike styling right from Mladin, Hayden, and Blake Young's race bikes! Trapezoidal-shaped sleeve which maximizes muffler volume. Silhouette flows with the bike's lines. Distinctive carbon fiber dual outlet end-cap design puts an enticing twist on the style of the original R-77, and still features sharp edges for attractive, eye-catching appeal. Further increases the mufflers open outlet area, resulting in increased exhaust flow while maintaining moderate decibel levels.