The popular R-77 offers outstanding performance, thanks to being developed in the heat of competition. It features a trapezoidal design, which allows a large volume of packing material and in turn delivers top performance. 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.Superbike technology and styling.Trapezoidal-shaped sleeve.Large volume of packing material.Straight baffle for ample flow.Innovative end-cap.Removable low-volume Insert.Stainless steel header and tail-pipe.Works Finish:Yoshimura Works Finish takes on a unique coloring after it goes through a heat cycle on the motorcycle that looks much like those titanium works components our factory racers use.Contemporary satin / matte finish.Uniform heat coloration.Increased fatigue strength.