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Product image 1YZ450F 18-19 / WR450F 19-20 / YZ450FX 19 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 2YZ450F 18-19 / WR450F 19-20 / YZ450FX 19 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 3YZ450F 18-19 / WR450F 19-20 / YZ450FX 19 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 4https://www.youtube.com/embed/k2X85qcDBDY?rel=0

*Product may vary by application

YZ450F 18-19 / WR450F 19-20 / YZ450FX 19 RS-4 Stainless Full Exhaust, w/ Aluminum Muffler

SKU: 234820D320


Regular price $799.00

MADE IN USA

Signature Series Exhaust System


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Same day shipping on In Stock items placed Mon-Fri by 1:00 pm PST. Please contact sales@yoshimura-rd.com for ETA's on Reserve Now / Pre-Order Items.


Emissions Compliance Declaration: QUALIFIED MANUFACTURER DECLARED "REPLACEMENT PART"


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


For 2018 Yamaha made some major refinements to the already potent YZ450F. Adding to the usable and tractable power is how we make the new YZ450F even better.

Now there can be more power to rip holeshots, yet making the bike user friendly at the end of the moto when your right hand gets a little frisky.The new Yoshimura RS-4 Signature Series full system adds 2.8% more h.p. and 1.4 ft-lb. more torque to give the rider better, more linear throttle response.

Proudly made in the USA!

. . . . .

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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  • Yamaha WR450F 2019
  • Yamaha WR450F 2020
  • Yamaha YZ450F 2018
  • Yamaha YZ450F 2019
  • Yamaha YZ450FX 2019
  • 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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