M4 Black Stainless Catalytic Converter Eliminator (Mid-pipe) for 2015 Yamaha R1/R1M | YA-CEKR115
All Black Stainless Cat. Eliminator removes 11 lbs off stock. Will work with stock muffler, or any aftermarket muffler that mounts in Standard/Stock position.
NOTE: M4 Recommends re-flashing your stock ECU to unleash the full potential of all M4 products on the 2015 Yamaha R1.