The Harley-Davidson Exhaust muffler with the part number 657 39 89 is a high-quality silencer designed for motorcycles. Featuring a single exit design, this muffler is specifically created by the renowned brand Harley-Davidson. These mufflers will require some heavy polishing or a re chrome, hence the price. No other history , than these came from my father in law’s old H D Bad Boy 1340 EVO
