Yoshimura Sound Insert Kit 99Db Rs-2 Muffler, 1.625" (Ins-07-K)Yoshimura Sound Insert Kit 99Db Rs 2 Muffler, 1. 625" (Ins 07 K) Replacement Low Volume Insert Kit for RS 2 Mufflers Non Spark Arrested Available as optional kit on applications requiring different sound restrictions Decibel reduction depends on application Kit Includes: Low Volume Insert Tube End cap collar Set screw This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and aftermarket accessories not