M4 spends extra time on research and development to ensure your system has the ultimate in quality workmanship.
M4’s unique silencer packing gun insures even distribution of packing material to help unleash that deep powerful exhaust note your bike was meant to have.
All systems are manufactured from the highest quality stainless steel, carbon fiber and titanium when applicable.

Unleash that deep powerful exhaust note your bike was meant to have.

For a sweet and unique look and sound, try the retro-drag slip-on, a dual black pipe with conical shape. A 21.50 pound weight savings over stock, and the sound of raw horsepower are just a couple of the reasons to try the retro-drag. Retail price starts at 635.