M4 GP2 Black Ceramic Slip-On Exhaust for '15-'20 Yamaha R1/R1M | YA9922-GP
This Ceramic Coated Black Slip On mounts to the stock catalytic converter to improve the looks of your R1.
NOTE: M4 Recommends re-flashing your stock ECU to unleash the full potential of all M4 products on the 2015 Yamaha R1.