With its trapezoidal-shaped sleeve that maximizes muffler volume and Superbike styling right from Mladin, Hayden, and Blake Young's race bikes, the R-77 slip-on from Yoshimura is your lightweight, performance exhaust system The R-77 Slip-On Exhaust consists of a trapezoidal-shaped sleeve, maximizing muffler volume, while offering a sharp silhouette to flow with the new body design The innovative Carbon Fiber end-cap is an evolution of the R-55 exhaust, featuring sharp edges for an attractive, eye catching appeal The R-77 muffler's front cap is MIG-welded, while the end cap is riveted using high-end 304-L polished stainless steel rivets and bands Maximizes torque and usable power for optimum gains throughout the entire powerband Removable Low-Volume Insert