19-24 CRF450X RS-4 FS SS/AL/CF
- Marked with appropriate EPA noise emissions labels
- Meet noise level regulations of most worldwide race sanctioning organizations
- For closed-course competition use only; not intended for street use
- Stainless systems come with 94 dB insert installed (meets AMA competition requirements), 2 meter Max insert in the box
- Tapered headpipe delivers optimal flow and performance
- Two-staged, stepped baffle
- Front cap design functions as a polyresonant chamber to lower dB output while improving mid- to top-end power
- Uniquely-styled pentagonal muffler body with a carbon fiber cone end cap
- Offers better handling thanks to a lower centralized mass coefficient
- Delivers huge power at a very light weight
- Not tested for EPA noise levels
224500D320