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Yoshimura RS-4 Signature Series Full Exhaust System
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 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.
Front muffler cap functions as a polyresonant chamber which helps reduce noise
Two-stage stepped baffle
Carbon fiber end-cap
CNC mandrel-bend header and tail pipe
Includes instructions and all required installation hardware
Fitment is guaranteed or your money back plus free return
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.
Wildcat 4 1000 2013-2014
Wildcat 1000 2012-2014
Wildcat 1000 X 2013-2014
250 SX-F 2012-2015
350 EXC-F 2012
350 SX-F 2011-2015
350 XC-F 2014-2015
450 SX-F 2012-2015
450 SX-F Factory Edition 2012-2013
450 XC-F 2013-2015
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
YZ250F 4-Stroke 2007-2017
YZ250FX 4-Stroke 2015-2017
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Questions & Answers
Will this also fit the 2014 350 XCF-W?
Yoshimura did not produce an exhaust to fit the that particular KTM model. FMF does produce an exhaust system to fit the 2014 KTM 350 XCF-W in the form of the Factory 4.1 RCT Full Exhaust System. We have that FMF 350 XCF-W exhaust system with a plain or blue-anodized muffler sleeve with a titanium end cap, or one with a blue sleeve and a carbon fiber end cap. All of those KTM FMF exhausts come with a MegaBomb header.