Yoshimura RS-3 Street Series Slip-On Exhaust R149SO2 The RS-3 is synonymous with the Yoshimura name. A member of our product line for years, it has proven itself as one of our signature exhaust systems. Kit includes a Bolt-On, RS-3 muffler with an easily removable low volume insert, installation hardware, and step-by-step instructions. Easily installed, this Bolt-On system will bolt right in place of your stock exhaust in just minutes