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 the RS-4 Muffler mated to a Full System.
Yoshimura Full System includes stainless steel RS-4 muffler with turn-out carbon fiber end-cap, low-volume insert, stainless steel header and tail-pipe, installation hardware, and step-by-step instructions.