S&S Cycle 4-1/2" MK45 Performance Mufflers — Tracer295172204 Product Description Product Instructions 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 Removable dB reducer Made in U. S. A. Notes Not for Trike applications Product Instructions S&S Cycle MK45 Slip On Mufflers M8 Without