Yoshimura RS-3 Slip-On Exhaust Honda CBR 600 F4I 2001-2006 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. Slip-Ons include an RS-3 muffler with an easily removable low volume insert, stainless steel mid-pipes, installation hardware and detailed step-by-step directions. Slip-Ons are an easy way to give your bike the performance, sound, and looks you crave. NOTE Please check local laws before purchasing. Some modifications may be prohibited in some states.