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

Valve springs must be installed at the correct OPEN HEIGHT

Replacement Manifold Absolute Pressure Sensor - Harley-Davidson

2-into-1 equal-length headers

Smooth radius air inlet for unobstructed air flow

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