Yoshimura R77 Race Exhaust System Suzuki Gsxr 750 / Gsxr 600 The popular Yoshimura R77 Full System 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 R77 muffler's front cap is MIG-welded, while the end cap is riveted using high-end 304-L polished stainless steel rivets and bands. Features: 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