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Yoshimura RS-4 Signature Series Slip-On Exhaust

Item: 339173

$449.00 – $669.00

Select Your Vehicle - Fitment Guaranteed

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
Specification Details
CARB Approved Yes
Country of Origin USA
Mid-Pipe Varies (make selection above)
Muffler End Cap Carbon Fiber
Muffler Sleeve Aluminum
USFS Approved Spark Arrestor Varies (make selection above)
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 250 2016-2022
  • FC 350 2016-2022
  • FC 450 2016-2022
  • FE 501 2017-2019
  • FX 350 2017-2022
  • FX 450 2017-2020
KTM
  • 250 EXC-F 2018-2019
  • 250 SX-F 2016-2022
  • 250 XC-F 2016-2022
  • 350 EXC-F 2017-2019
  • 350 SX-F 2016-2022
  • 350 XC-F 2016-2022
  • 450 SX-F 2016-2022
  • 450 XC-F 2017-2022
  • 500 EXC-F 2017-2019
Kawasaki
  • KX250 4-Stroke 2019-2020
  • KX250F 4-Stroke 2017-2018
  • KX450 4-Stroke 2019-2023
Suzuki
  • RM-Z450 2008-2024
Yamaha
  • WR450F 2016-2023
  • YZ250F 4-Stroke 2019-2024
  • YZ250FX 4-Stroke 2020-2024
  • YZ450F 2014-2017, 2020-2022
  • YZ450FX 2016-2017, 2019-2023

Customer Reviews

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Questions & Answers

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Will this really fit a 2018 Husqvarna FE501?

Yes, just choose that year/model before adding to your cart and you will receive the correct slip-on for it.

By Andy
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Is this the same loudness as stock exhaust

This Yoshimura RS-4 will be much louder than the stock exhaust.

By Staff
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