4-1/2" MK45 Performance Mufflers - Black Tracer Assemblies Valve springs must be installed

Valve springs must be installed at the correct OPEN HEIGHT

passes through the backing plate and exits inside the mouth of the throttle body through the proprietary breather tubes

2-into-1 equal-length headers

Assembly is trued to less than

4-1/2" MK45 Performance Mufflers - Black Tracer Assemblies Valve springs must be installed4 1 2" MK45 Performance Mufflers Black Tracer 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