16-20 Yamaha XSR900 M4 Black Full System w/RM1 Muffler
2016-2020 Yamaha XSR900 M4 Black Full System w/RM1 Muffler Black full system Stainless Steel tubing RM1 style muffler Saves 10lbs over stock Produces 8 horsepower over the stock system Stock db 89 @ 5,500 rpm/ M4 db 105 @ 5,500 rpm 304 Stainless steel tubing with high temp ceramic coating...