YOSHIMURA RS12 SYSTEM YAM - 961-6419Aggressive, asymmetrical shaped RS 12 profile maximizes muffler volume, manages sound, adds power and provides more clearance for tire and brake caliper. RS 12 systems utilize precision machined joints. Works look matte carbon fiber end cap with intricate details. New carbon fiber cap eases servicing as compared to other sandwich mounting designs most commonly found in the industry. New patent pending Precision Taper Fit (PTF) insert ring Tapered