DescriptionThe RS-4 is a unique design with predicated power and a quiet earthy exhaust note that speaks volumes for performance. This RS-4 features all the benefits of our original RS-4 muffler, but with a unique turned-out end-cap, designed to direct exhaust heat and gases away from the bike's components. To top-it-off, we embossed our Yoshimura's "347" logo in the carbon for a clean look. With all its benefits in mind, the RS-4 was an obvious choice for the WR450F.
Full System includes an RS-4 muffler, stainless steel header and tail-pipe, USFS approved spark arrester, all installation hardware, and step-by-step instructions.