YOSHIMURA BMW S1000R 2014-15 / S1000RR 2015 Race R-77 FS SS-CF-CF R-77 The RS-4 features a Polyresonant

The RS-4 features a Polyresonant duplex chamber

CE-certified protection on the shoulders and elbows

Front muffler cap functions as a polyresonant chamber which helps reduce noise

Innovative end-cap design

YOSHIMURA BMW S1000R 2014-15 / S1000RR 2015 Race R-77 FS SS-CF-CF R-77 The RS-4 features a PolyresonantThe 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 mufflers 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