18-19 YZ450F SIGN RS-4 FS SS/AL/CF
- Uniquely-styled pentagonal muffler body with a carbon fiber cone end cap
- Offers better handling thanks to a lower centralized mass coefficient
- Two-staged, stepped baffle
- Front cap design functions as a polyresonant chamber to lower dB output while improving mid- to top-end power
- 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
- Delivers huge power at a very light weight
- All Signature series exhaust are tested, documented and marked with appropriate EPA noise emissions labels
234820D320