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
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