Yoshimura RS-4 Enduro Series Slip-On Exhaust

Item Number: 339171


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Product Description


Yoshimura RS-4 Enduro Series Slip-On Exhaust

All Yoshimura Enduro Series exhaust components are equipped with USFS-approved spark arrestor, have forest-friendly noise levels, and are tailpipe emissions compliant.

The work that went into developing the RS-4 muffler design paid big dividends during development in AMA Pro Racing. That research was directed at developing the RS-4's unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 muffler features a polyresonant duplex chamber, a two-staged stepped baffle and an innovative carbon cone end cap.

  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber to reduce noise
  • Two-stage stepped baffle
  • Carbon fiber end-cap
  • Includes all required hardware and installation instructions
  • USFS-approved spark arrestor

Spec Details
Country of Origin USA
Muffler End Cap Carbon Fiber
Muffler Sleeve Aluminum
USFS Spark Arrestor Yes

Vehicle Fitment

Fitment is guaranteed or your money back plus free return shipping. Don't waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.


  • 250 SX-F 2011-2014
  • 350 EXC-F 2012-2015
  • 350 SX-F 2011-2015
  • 350 XC-F 2014-2015
  • 450 SX-F 2011-2015
  • 450 SX-F Factory Edition 2012
  • 450 XC-F 2013-2015
  • 450 XC-W 2012-2015
  • 500 EXC 2012-2015
  • 500 XC-W 2012-2015


  • WR450F 2012-2014

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