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Product image 1KTM 450SX-F/HUSQ 450/FX450 16-18 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 2KTM 450SX-F/HUSQ 450/FX450 16-18 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 3KTM 450SX-F/HUSQ 450/FX450 16-18 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 4KTM 450SX-F/HUSQ 450/FX450 16-18 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 5KTM 450SX-F/HUSQ 450/FX450 16-18 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 6KTM 450SX-F/HUSQ 450/FX450 16-18 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 7KTM 450SX-F/HUSQ 450/FX450 16-18 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 8KTM 450SX-F/HUSQ 450/FX450 16-18 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler

*Product may vary by application

KTM 450SX-F/HUSQ 450/FX450 16-18 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler

SKU: 264610D320


Regular price $739.00

MADE IN USA

Signature Series Exhaust System


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Emissions Compliance Declaration: QUALIFIED MANUFACTURER DECLARED "REPLACEMENT PART"


WARNING: Cancer and Reproductive harm - www.p65warnings.ca.gov


Introducing the brand-new RS-4 Full System from Yoshimura R&D of America.

Yoshimura took the time to develop and test in order to deliver the best exhaust system available for the new KTM and Husqvarna 450, and the results were worth the wait. We took everything we have learned over the last several years with our world famous RS-4 muffler and revised it with the latest materials and an updated spec that makes this new model perform.

The performance gains that were realized on this system are nothing short of amazing. The dyno tells us that this new RS-4 system gained 3 horsepower over the stock system plus increased torque throughout the entire RPM range.

It's time to change the exhaust on your KTM or Husky to Yoshimura

*Please note that there is not a carbon fiber option available for this system.

  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber which helps reduce noise
  • Two-stage stepped baffle
  • Carbon fiber end-cap
  • Stainless steel header, tail-pipe with aluminum muffler
  • Repack Kits and optional Inserts are available for all models

. . . . .

This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and aftermarket accessories not found on a bike as delivered from the factory may not be compatible with this product.

Attention international customers: This product was designed and tested to be compatible with vehicles in the U.S. marketplace only. Compatibility, including fitment and performance, may vary by marketplace.

Signature Series Exhaust System

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Introducing Signature Series by Yoshimura - an offering of exhaust systems that a dealer can install with confidence. Our Signature Series lineup is the answer for today's dealer who is faced with a challenging marketplace. The applications for the Signature Series line cover the entire powersports spectrum, including many of our off-road applications. Every one of our Championship Winning Motocross exhaust systems and nearly all of our ATV/Side-by-Side applications are members of the Signature Series Family. All Signature Series components are tested, documented, and marked as required by federal and state regulations.

Vehicle Fitment

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  • Husqvarna FC450 2016
  • Husqvarna FC450 2018
  • Husqvarna FX450 2017
  • Husqvarna FX450 2018
  • KTM 450SX F 2016
  • KTM 450SX F 2017
  • KTM 450SX F 2018
  • KTM 450XC F 2017
  • KTM 450XC F 2018
  • Reviews

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    Race series product restriction and affirmation

    Warning:

    The RACE SERIES product you are purchasing removes, renders inoperative, or bypasses required elements of the emission control systems of EPA, certified motorcycles of motorcyle engines and may only be installed on motorcycles that are restricted to closed course competition. Installation of this product on a motorcyle that is ridden on a public street, highway, or public lands violates the tampering and defeat device provisions of the Clean Air Act & 203(a)(3)(A) and/or & 203(a)(3)(B) and may subject you to a civil penalty of up to $37,000.

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    Race Information

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    Affirmation

    By clicking below, I affirm:
    1. that i have read the above warning;
    2. that any information I have entered is accurate; and
    3. that any motorcycle on which I install the RACE SERIES product will be restricted to closed course competition and will not be ridden on any public street, highway or public lands.
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