Yoshimura R-55 Slip-On Muffler Stainless/Stainless/Carbon for Yam YZF-R6V 06-13 All Street Series systems are Slip-on/Bolt-on applications that do not require tampering with the vehicles emissions control system, yet still deliver that special spirit the world has come to expect from the legendary company known as Yoshimura. Street Series applications cover all of the iconic profiles that Yoshimura has become famous for. From the legendary tri-oval profiles to the refined carbon fiber R-77 mufflers, and even our R-55 angular masterpieces. The Street Series exhaust offer street-legal options for almost everything on two wheels. CARB/EPA tail-pipe emissions compliant