Graves' precise engineering develops precision products that are designed to outlook, outperform and outlast the competition. Graves Exhaust systems are designed for the elite rider seeking top of the line performance, fit, finish and value. This exhaust system was developed using the same technology that has powered the Graves Racing Team and supported racers to 31 Professional AMA National Championships including 9 Superbike Championship titles and 3 Pro Side x Side. The Goal of Graves when designing this exhaust system is to provide the best performing, highest quality product on the market. They did not compromise in the development of this system. Material diameters, the silencer core size and length are optimized for maximum power output throughout the throttle and RPM range. Slip-on silencer. New octagon silencer design featuring greater volume for reduced sound, long life and a deep throaty exhaust note.