Yoshimura RS-4 Signature Series Slip-On Exhaust

Item Number: 339173


Edit Vehicle


Product Description


Yoshimura RS-4 Signature Series Slip-On Exhaust

Yoshimura Signature Series exhaust components are the answer for riders faced with ever-tightening noise and emissions regulations at the federal level. All Signature Series components are independently tested, documented, and marked as required by state and federal regulations as CARB/EPA-compliant.

The work that went into developing the RS-4 slip-on 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.

  • Easy-to-install slip-on design
  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber which helps reduce noise
  • Two-stage stepped baffle
  • Carbon fiber end-cap
  • CNC mandrel-bent stainless steel tail pipe
  • Includes instructions and all required installation hardware
  • 80dB EPA noise emissions compliant

Spec Details
CARB Approved Varies (make selection above)
Country of Origin USA
Muffler End Cap Carbon Fiber
Muffler Sleeve Varies (make selection above)
USFS Spark Arrestor Varies (make selection above)

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.

Arctic Cat

  • Wildcat 1000 2012-2013


  • CRF250R 2010-2013
  • CRF450R 2009-2012


  • KX250F 2010-2016
  • KX450F 2012-2015


  • RZR XP 4 900 2012-2013
  • RZR XP 4 900 EPS 2012-2013
  • RZR XP 4 900 Jagged X 2013
  • RZR XP 900 2011-2013
  • RZR XP 900 EPS 2012-2013
  • RZR XP 1000 2014


  • RM-Z250 2010-2017
  • RM-Z450 2008-2017


  • WR250F 2015-2017
  • XTZ1200 Super Tenere 2012-2015
  • XTZ1200 Super Tenere ES 2014-2015
  • YZ250F 4-Stroke 2007-2017
  • YZ250FX 4-Stroke 2015-2017
  • YZ450F 2010-2013

Customer Reviews

Questions & Answers