Experience the next level of performance with the Yoshimura RS-12 Slip On Exhaust designed specifically for the CRF450R/RX. This exhaust system stands out with its unique design and attention to detail, featuring a matte carbon fiber end cap enhanced with decal inlays and precision machined joints. The RS-12 is engineered to maximize muffler volume, manage sound, and improve power output while providing ample clearance for tire and brake calipers. Upgrade your dirt bike with the Yoshimura RS-12 and feel the difference in your ride. Features: * Aggressive Design: Asymmetrical shaped RS-12 profile maximizes muffler volume, manages sound, adds power, and provides more clearance for tire and brake caliper. * Precision Machined Joints: RS-12 systems utilize precision machined joints for a perfect fit. * Matte Carbon Fiber End Cap: Works-look matte carbon fiber end cap with intricate details enhances performance and aesthetics. * Easy Servicing: New carbon fiber cap design eases servicing compared to common sandwich mounting designs in the industry. * Patent Pending PTF Insert Ring: Innovative Precision Taper Fit (PTF) insert ring for improved performance. * Tapered Muffler Body Inlet Design: Specially designed tapered muffler body inlet for enhanced exhaust flow.