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Product image 1KX450F 19-23 / KX450X 21-23 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 2KX450F 19-23 / KX450X 21-23 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 3KX450F 19-23 / KX450X 21-23 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 4KX450F 19-23 / KX450X 21-23 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 5KX450F 19-23 / KX450X 21-23 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 6KX450F 19-23 / KX450X 21-23 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 7KX450F 19-23 / KX450X 21-23 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler
Product image 8KX450F 19-23 / KX450X 21-23 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler

*Product may vary by application

KX450F 19-23 / KX450X 21-23 RS-12 Stainless Full Exhaust, w/ Aluminum Muffler

SKU: 244720S320


Regular price $979.00

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


The current generation Kawasaki KX450 has won over a lot of riders with its balanced chassis and predictable power delivery. We felt there’s still more on the table for improvement, enter our new RS-12.

With countless hours of track and dyno testing, the KX450 responded well to our RS-12 with crisp and clean usable power that is up across the entire rpm spectrum. The result, max HP was up 9.6% and torque was up as well at 5.6%.

Yoshimura RS-12 will improve your experience on the green machine and decrease dB level from stock noise levels. Just what the doctor ordered.

Proudly designed, developed and made in the USA!

  • Rubber mounted RS-12 muffler dampens vibration to subframe
  • Aggressive intelligently designed, the RS-12 asymmetrical shaped muffler allows maximize capacity and incorporates a resonance chamber for managing sound and increasing usable power. RS-12's unique profile also provides more clearance for tire and brake caliper.
  • Improved performance gains with refined power delivery.
  • Just like the works systems our Factory Racers use, RS-12 systems utilize precision machined joints. Machined joints provide a superior and exacting fit for joints by better securing the seal between two surfaces with a perfect 360 degree contact surface which translates into improved system life, fit and performance.
  • New patent pending Precision Taper Fit (PTF) insert ring makes it easy to install and remove sound inserts and spark arresters.
  • Works-look matte carbon fiber end cap with industry leading design, innovation and detailing as expected from Yoshimura.
  • Carbon end cap covers the RS-12 inner cap, thus improving looks, while providing easier service as compared to other sandwich mounting designs most commonly found in the industry.
  • Repack Kits, optional Inserts and Spark Arresters 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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  • Kawasaki KX450F 2019
  • Kawasaki KX450F 2020
  • Kawasaki KX450F 2021
  • Kawasaki KX450F 2022
  • Kawasaki KX450F 2023
  • Kawasaki KX450X 2021
  • Kawasaki KX450x 2022
  • KAWASAKI KX450X 2023
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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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