4-1/2" MK45 Performance Mufflers - Black with Black Tracer - 550-0625Mk45 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.. Not for Trike applications..