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Yoshimura RS-4 Signature Series Full Exhaust System

(1 review)

Item: 338943

$649.00 – $759.00

Select Your Vehicle - Fitment Guaranteed

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.

  • 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-bend header and tail pipe
  • Includes instructions and all required installation hardware
  • 80dB EPA noise emissions compliant
Specification Details
CARB Approved Yes
Country of Origin USA
Header Construction Stainless Steel
Muffler End Cap Carbon Fiber
Muffler Sleeve Aluminum
USFS Approved Spark Arrestor No
Warranty 1 Year Manufacturer Warranty

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.

Husqvarna
  • FC 450 2016-2018
  • FX 450 2017-2018
KTM
  • 450 SX-F 2016-2018
  • 450 XC-F 2016-2018
Kawasaki
  • KX250 4-Stroke 2019-2020
  • KX250F 4-Stroke 2017-2018
Suzuki
  • RM-Z450 2008-2017
  • RMX450Z 2010-2011
Yamaha
  • WR450F 2016-2020
  • YZ450F 2014-2019
  • YZ450FX 2016-2018

Customer Reviews

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Good

By   on 

Its so good. Just won a race.


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Questions & Answers

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Will it fit a 2021 Ktm 250xcf

Yes, so long as you choose that 2021 KTM 250XC-F from the vehicle selection before adding to your cart.

By Andy
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