Yosh’s RS-4 Slip-on is a staple in their race-tested lineup that maximizes weight savings and power to give you the ride of your life. The RS-4 is set apart by its pentagonal muffler shape that is done specifically to maximize internal volume without making the entire slip-on unwieldy in size. The front cap of the RS-4 is a newly designed polyresonant chamber that works along with the stepped, two-stage core baffle to lower sound and bump up power output in the mid to top end of your power band. Yoshimura has designed the RS-4 for good looks too with the stainless steel and aluminum giving the slip-on a clean look and the carbon end cap bringing the attitude. It’s more than skin deep though as the RS-4 is built to last seasons of hard riding. It connects to the header pipe using a robust clamp, not just gasket maker, and secures to the bike using a mounting tab that is welded to the muffler instead of riveted for long lasting durability.
With a twist of your wrist you can find out how much of a difference the Yoshimura RS-4 will make to your bike ’s performance. Get some new gloves, because you’ll need to hold on tight.
Includes 94dB sound insert
Polyresonant chamber in front cap
Clamps to head pipe
Welded mounting bracket
Increases mid and high range performance
Increased packing volume with pentagonal shape
Stepped, two-stage baffle
Spark Arrester not included but is available (sold separately part #211887).
NOTE: Depending on application, Yoshimura may recommend rejetting/remapping