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Yoshimura KTM 350 SX-F 13-15/XC-F 14-15 RS-4 STAINLESS FULL SYSTEM, W/ ALUMINUM MUFFLER


The work that went into developing the RS-4 muffler has paid big dividends in Off-road Racing; winning multiple Supercross and Motocross titles since it's inception. We've developed the current generation RS-4 based on that research & development, and the result is a unique design that provides an unrivaled combination of power and quiet exhaust tone. The RS-4 features a Polyresonant duplex chamber and two-staged stepped baffle for increased performance, while a carbon cone end cap finishes off its innovative styling.


  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber which helps reduce noise
  • Two-stage stepped baffle
  • Carbon fiber end-cap
  • Stainless steel header and tail-pipe
  • Fits on:
  • KTM 350SX F 2013
  • KTM 350SX F 2014
  • KTM 350SX F 2015
  • KTM 350XC F 2014
  • KTM 350XC F 2015

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