US Dollar
The RS-4 is pentagonal shaped muffler that features a carbon fiber cone end cap, two staged stepped baffle and striking good looks. The RS-4 muffler features a new front cap design that functions as a polyresonant chamber. thus creating a more quiet muffler with improved mid to top end power. Along with improving sound and power, this system moves the muffler weight lower and closer to the bike for improved handling and weight distribution. Yoshimura continues to provide the best in performance exhaust systems.
Race series exhaust
* Designed for closed-course competition use only; not for street use
* Meet noise level regulations of most worldwide race sanctioning organizations
* Marked with appropriate EPA noise emissions labels
* Not tested for EPA noise levels
RS-4
* Sophisticated, stylish muffler design
* RS-4 is a pentagonal-shaped muffler body that features a two-staged stepped baffle and carbon-fiber cone end cap
* Muffler front cap design functions as a polyresonant chamber that improves mid-range and top-end power, and keeps the muffler quieter
* Full system features stainless steel header pipes
Yoshimura RS-4 Slip-On Exhaust for CRF250L 17
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