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Product image 1KX450/X 2024 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 2KX450/X 2024 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 3KX450/X 2024 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 4KX450/X 2024 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 5KX450/X 2024 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 6KX450/X 2024 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 7KX450/X 2024 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 8KX450/X 2024 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 9KX450/X 2024 RS-12 Stainless Full Exhaust, w/ Stainless Muffler

*Product may vary by application

KX450/X 2024 RS-12 Stainless Full Exhaust, w/ Stainless Muffler

SKU: 244730S320


Regular price $979.00

MADE IN USA

Signature Series Exhaust System

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over $100

1-YEAR
Warranty

Repair Services
Available

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 2024 Kawasaki KX450 has undergone a ton of changes, one of them requiring an all-new exhaust system. We were eager to develop the best exhaust system possible for the new Green Machine.

Working with multi-time GNCC off-road Champion Steward Baylor we were able to really squeeze every ounce of performance from the new KX. Not only performance but installation on the new KX has been optimized. Working around the new KX chassis we were able to make the new oval-port header fit effortlessly.

Performance gains are massive with our RS-12 Signature Series system, adding a whopping 23.8% max hp and an incredible 16.4% max torque. With gains like this some would think that the new KX would be hard to control, not the case. With the help of our hydroformed oval header, our development team has made the power delivery much smoother than stock!

Our RS-12 muffler has loads of features including our PTF insert system that makes changing inserts a breeze and an optimized muffler shape with added volume and brake caliper clearance. Optional spark arrestor SA-21-K available separately.

Yoshimura's RS-12 systems proudly designed, developed and manufactured in Chino, California.
  • 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.

Vehicle Fitment

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  • Kawasaki KX450F 2024


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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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    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.