Yoshimura R-77 Street Series Dual Slip-Ons - Stainless Steel Mufflers - Carbon Fiber End Caps 1121205All 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