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Yoshimura worked in secret with Top AMA Pro Riders: Jeremy McGrath, Justin Barcia, Trey Canard, Eli Tomac, and Justin Brayton, to achieve maximum performance, mass centralization, and optimize rider-usability. They were able to achieve all this, while keeping sound levels in check with AMA Regulation. The Yoshimura RS-9D's parallelogram-shaped muffler body increases muffler volume over the stock system, resulting in better throttle response and improved noise cancellation. The dual setup enabled Yoshimura to position the mufflers closer to the bike's center of gravity (mass centralization) resulting in better handling for the rider. An additional benefit of the mass centralization process was decreasing potential for muffler damage in the event of crash.
Slip-On System features dual RS-9D Aluminum Sleeved Mufflers with Carbon Fiber End-caps, Stainless Steel Tail-pipe, installation hardware, and detail step-by-step instructions.
RS-9D's parallelogram-shaped muffler body increases muffler volume over the stock system, resulting in better throttle response and improved noise cancellation.
Yoshimura's vertical divider splits the exhaust gases more evenly compared to the stock horizontal divider, providing smoother flow which improves mid to top power and throttle response.
RS-9D not only makes more power and torque possible, but does it more quietly than single systems.
Uniquely sculpted Carbon Fiber end-caps feature a Tunable Insert System, able to fine-tune power delivery and decibel levels to rider specifications.