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. Step up your motorcycle's style and power with the M4 RM1 Full System Exhaust. Midpipe is designed to give exhaust gases optimum flow and improved power characteristics. Includes tapered and equal length headpipes with true high-flow merge collectors. The RM1 full system exhaust system will shed weight over stock to give your sport bike improved power-to-weight ratio. M4 has built a quality fitting exhaust that is a breeze to install; all mounting hardware and instructions included.