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About Yoshimura RS-4 Signature Series Slip-Ons

Yoshimura RS-4 Signature Series Slip-Ons

  • 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
  • Titanium systems include non-spark-arrested 99 dB motocross insert (unless noted)
  • Mufflers available with glossy carbon fiber, satin titanium or brushed aluminum sleeve
  • Stainless systems come with 94 dB insert installed (meets AMA competition requirements), 2 meter Max insert in the box.
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