Yoshimura Rs 4 Stainless/Aluminum Slip On

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The new Yoshimura RS-4 motorcycle exhaust was developed using experience gained during R&D for Race Team exhausts, and it works brilliantly. The MX exhaust offers great horsepower gains, weight savings, and or course that great Yoshimura look. RS-4 Pentagonal shaped muffler that features a carbon end cap, two staged stepped baffle, and striking good looks. The muffler features a new front cap design that functions as a polyresonant chamber. The design makes for a quieter muffler with improved mid and top end power. An AMA-approved sound insert comes installed in the muffler, and an additional 2 meter-max insert in the box.