YOSHIMURA RS-4 OFF-ROAD FULL SYSTEM EXHAUST 17-20 CRF250L RS-4 FS SS/SS/CF

For closed-course competition use only; not intended 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

Delivers huge power at a very light weight

Offers better handling thanks to a lower centralized mass coefficient

Uniquely-styled pentagonal muffler body with a carbon fiber cone end cap

Front cap design functions as a polyresonant chamber to lower dB output while improving mid- to top-end power

Two-staged, stepped baffle

Tapered headpipe delivers optimal flow and performance

Stainless systems come with 94 dB insert installed (meets AMA competition requirements), 2 meter Max insert in the box

Stainless Steel Header / Stainless Steel Muffler / Carbon Fiber End Cap

If youre looking for that competitive edge, look no further than the Race Series. These exhaust systems are designed with nothing but power in mind. Each Race Series system is developed in accordance with noise compliance regulations imposed by most racing sanctioning bodies worldwide.

Features:

• All applications are marked with appropriate EPA noise emissions labels
• Has not been tested for EPA noise compliance
• RS-4 - a unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 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 which helps reduce noise
• Two-stage stepped baffle
• Series: Race
• Muffler Type: RS-4
• Header/Muffler/End Cap TYPE: SS/SS/CF
• FOR CLOSED COURSE COMPETITION ONLY; NOT INTENDED FOR STREET USE