The Ninja 650 is a unique and versatile machine. Yoshimura took the opportunity to create a system that would not only improve performance, but also enhance characteristics inherit in the original engineering, i.e. centralized mass and low-center of gravity. They were able to achieve this through use of their RS-4 Muffler mated to a Full System, giving Ninja 650 owners the ultimate in Yoshimura power. Yoshimura full system includes stainless steel RS-4 muffler with turn-out carbon fiber end-cap, stainless steel header and tail-pipe, low-volume insert, installation hardware, and step-by-step instructions. Note: For closed course competition use only. Not intended for street use.