M4 Exhaust manufactures exhausts which add power and a more race-inspired sound to your bike as well as lowering the overall weight. Extra time on research and development ensures your exhaust has the ultimate in quality workmanship, ease of installation, and the best performance possible for your motorcycle. M4 Exhausts are available in both Standard / Race and GP Series mounting configurations. Step up your motorcycle's style and power with the M4 Street Slayer Full System Exhaust. The Street Slayer Full System mounts much like the M4 "GP" system; much lower and forward than stock, near the right rider foot peg. The System has the "GP" look and sound; with a slightly lower dB level. Enjoy a deep throaty tone from the lower RPM range through the mid-range - open it up and it screams MotoGP! Includes tapered and equal length headpipes with true high-flow merge collectors.