S&S CYCLE - 4-1/2" MK45 PERFORMANCE MUFFLERS - CHROME TRACER4 1 2" MK45 Performance Mufflers Chrome Tracer Highlights 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. Not for Trike applications Notes Not for Trike applications + Fitment 2017 2025 Harley