RS-4 muffler type. Stainless/stainless/carbon.

• 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
• Stainless steel muffler sleeve
• System comes with 94 dB insert installed (meets AMA competition requirements), 2 meter Max insert in the box