Yoshimura's Street Series exhausts do not require tampering with your vehicle's emissions control system while still delivering that special spirit the world has come to expect from a Yoshimura exhaust.
The work that went into developing the RS-4 muffler design paid big dividends during development in AMA Pro Racing. That research was directed at developing the RS-4's unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 muffler features a polyresonant duplex chamber, a two-staged stepped baffle and an innovative carbon cone end cap.
Pentagonal-shaped sleeve
Front muffler cap functions as a polyresonant chamber to reduce noise
Two-stage stepped baffle
Carbon fiber end-cap
Includes all required hardware and installation instructions
Product Note:
Specification
Details
CARB Approved
Yes
Country of Origin
USA
Mid-Pipe
Stainless Steel
Muffler End Cap
Carbon Fiber
Muffler Sleeve
Stainless Steel
Warranty
1 Year Manufacturer Warranty
Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
Honda
CRF300L 2021-2022
CRF300L Rally 2021-2022
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