S&S CYCLE 1801-0847 550-0619 4-1/2" MK45 Performance Mufflers - Chrome with Black ThrusterFeatures Mk45 4 1 2" Touring Mufflers are the result of decades of riding, racing and tuning Combines both a stainless steel baffle and RaceTEX cartridge packing Create a deep rumble and improved horsepower and torque, all while adding a unique look with styled aluminum endcaps Includes removable dB reducer Made in U. S. A. Notes Not for Trike applications. WARNING Qualified Manufacturer declared replacement part on FL touring models listed.