Yoshimura - RS-4 Pro Series Series/Competition Series Exhaust Systems

Product Information

Price Range: $551.00 - $1044.00


  • Deliver huge power at a very light weight
  • Offer 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
  • Pro Series features titanium header construction; Competition Series features stainless steel header construction
  • Pro Series mufflers include non-spark-arrested 99 dB motocross insert
  • Mufflers available with glossy carbon fiber, satin titanium or brushed aluminum sleeve
  • Systems come with 96 dB insert installed (meets AMA competition requirements), 2 meter Max insert in the box
  • Please see page 46 of the 2014 Parts Unlimited Off-Road catalog for additional RS-4 applications