Introducing the Yoshimura RS-12 System Kaw 242940S320, the ultimate upgrade for your dirt bike. After years of rigorous development and testing, this exhaust system is designed in collaboration with top factory-sponsored athletes and dedicated engineers to deliver unparalleled performance. The RS-12 stands out with its unique design, featuring a matte carbon fiber end cap and precision machined joints, ensuring both durability and style. Experience improved sound management and power output while maintaining optimal clearance for tires and brake calipers. Get ready to elevate your ride with the next-level engineering of the RS-12. Features: * Aggressive Profile: 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 enhanced durability. * Matte Carbon Fiber End Cap: Works-look matte carbon fiber end cap with intricate details for a sleek finish. * Easy Servicing: New carbon fiber cap eases servicing compared to common sandwich mounting designs. * Patent Pending PTF Insert Ring: Innovative Precision Taper Fit (PTF) insert ring for optimal performance. * Tapered Muffler Body Inlet Design: Tapered design improves airflow for increased performance.