08-16 HONDA CBR1000RR: M4 GP Series Slip-On Exhaust (BLACK) 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.The GP Series mounts much lower and forward than stock, right near the right rider foot peg.This mount will give you that "GP" look and sound.Enjoy a deep, throaty ton