Wish Lists
0 My Cart

Your cart is currently empty.

Continue shopping
Total: $0.00
View cart
Toggle menu
0
  • Home
  • FMF Racing Kawasaki KX450F 19-23 / KX450X 21 SS Aluminum Factory 4.1 RCT SO Muffler w/ R.Carbon Cap
-21%
FMF Racing Kawasaki KX450F 19-23 / KX450X 21 SS Aluminum Factory 4.1 RCT SO Muffler w/ R.Carbon Cap
Click to zoom in
Load image into Gallery viewer, FMF Racing Kawasaki KX450F 19-23 / KX450X 21 SS Aluminum Factory 4.1 RCT SO Muffler w/ R.Carbon Cap

Have Questions?

1 (888) 417 9079 Ask an Experts

  • Guaranteed Fitment

    Always the correct part

  • In-House Experts

    We know our products

  • Added Value

    Mounting, Balancing

  • FREE DELIVERY

    Free delivery on most of our products

FMF Racing Kawasaki KX450F 19-23 / KX450X 21 SS Aluminum Factory 4.1 RCT SO Muffler w/ R.Carbon Cap

FMF042369
In stock
Muffler
$599.99 $472.00
Upgrade your ride with the FMF Racing Kawasaki KX450F 19-23 / KX450X 21 SS Aluminum Factory...
$472.00
customers are viewing this product
FMF Racing Kawasaki KX450F 19-23 / KX450X 21 SS Aluminum Factory 4.1 RCT SO Muffler w/ R.Carbon Cap
Description

Upgrade your ride with the FMF Racing Kawasaki KX450F 19-23 / KX450X 21 SS Aluminum Factory 4.1 RCT SO Muffler w/ R.Carbon Cap, engineered to deliver unmatched performance and durability for serious motocross and off-road riders. This high-performance exhaust system integrates FMF’s innovative Resonance Chamber Technology™ both internally and externally, enhancing power delivery and throttle response across the entire RPM range.

With its shorter overall length, this system is less prone to crash damage and benefits from FMF’s Factory Forward Engineering, placing the muffler closer to the engine for better weight centralization and improved handling. The combination of stainless steel midpipe, lightweight aluminum canister, and carbon fiber end cap ensures a rugged yet race-ready design that shaves off critical weight while maximizing strength.

The FMF Racing Kawasaki KX450F 19-23 / KX450X 21 SS Aluminum Factory 4.1 RCT SO Muffler w/ R.Carbon Cap also includes a Rapid Tuning System (RTS) that allows for quick, tool-free tuning on the fly, ideal for adapting to changing track or trail conditions. With an included spark arrestor and 94dB quiet insert, it's also ready for a wide range of riding environments.

Features:

  • Resonance Chamber Technology™ – Enhances exhaust flow for increased power and torque throughout the RPM range.

  • Factory Forward Engineering – Positions the muffler closer to the engine, centralizing mass for improved handling and reduced crash risk.

  • Aerospace-Grade Construction – Lightweight aluminum and carbon fiber end cap reduce overall weight without compromising strength.

  • Rapid Tuning System (RTS) – Allows quick adjustments to optimize performance based on conditions.

  • Removable Spark Arrestor & Quiet Insert – Versatile setup for both closed-course racing and trail compliance.

Say goodbye to restrictive stock mufflers and unleash the full potential of your Kawasaki KX450F or KX450X. The FMF Racing Factory 4.1 RCT SO Muffler delivers track-tested power gains, sharper throttle response, and better weight distribution, giving you the edge on every ride.

Specifications:

Type Slip-On Muffler
Construction Aluminum with Carbon Fiber End Cap
Finish Natural
Midpipe Material Stainless Steel
Endcap Material Carbon Fiber
Spark Arrestor Included
Quiet Insert 94dB Insert Included
Weight 6.4 lbs
Compatibility Kawasaki KX450F (2019–2023), KX450X (2021)
Use Closed Course Only



This Part Fits:

 

Year Make Model Submodel
2019-2021 Kawasaki KX450F Base

REVIEWS

JS

Absolutely loving the power gains from this FMF muffler! Throttle response feels way snappier, and the sound is pure music without being obnoxious. Installation was a breeze, and it looks mint on my 2022 KX450F. FMF really nailed it with the design, super light and no issues so far after a few hard rides.

⭐️⭐️⭐️⭐️⭐️

Jason S.

Boise, ID

MT

I was on the fence about upgrading, but this exhaust totally transformed my KX450X. It’s lighter, louder (in a good way), and makes the bike feel way more alive. I noticed smoother power delivery right off the bat. Bonus points for the carbon cap, it looks wicked. No regrets, worth every cent!

⭐️⭐️⭐️⭐️⭐️

Marcus T.

Greenville, SC

Read More
Read Less

Nam tempus turpis at metus scelerisque placerat nulla deumantos solicitud felis. Pellentesque diam dolor, elementum etos lobortis des mollis ut risus. Sedcus faucibus an sullamcorper mattis drostique des commodo pharetras loremos.

Returns Policy

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi ut blandit risus. Donec mollis nec tellus et rutrum. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Ut consequat quam a purus faucibus scelerisque. Mauris ac dui ante. Pellentesque congue porttitor tempus. Donec sodales dapibus urna sed dictum. Duis congue posuere libero, a aliquam est porta quis.

Donec ullamcorper magna enim, vitae fermentum turpis elementum quis. Interdum et malesuada fames ac ante ipsum primis in faucibus.

Curabitur vel sem mi. Proin in lobortis ipsum. Aliquam rutrum tempor ex ac rutrum. Maecenas nunc nulla, placerat at eleifend in, viverra etos sem. Nam sagittis lacus metus, dignissim blandit magna euismod eget. Suspendisse a nisl lacus. Phasellus eget augue tincidunt, sollicitudin lectus sed, convallis desto. Pellentesque vitae dui lacinia, venenatis erat sit amet, fringilla felis. Nullam maximus nisi nec mi facilisis.

Shipping

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi ut blandit risus. Donec mollis nec tellus et rutrum. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Ut consequat quam a purus faucibus scelerisque. Mauris ac dui ante. Pellentesque congue porttitor tempus. Donec sodales dapibus urna sed dictum. Duis congue posuere libero, a aliquam est porta quis.

Donec ullamcorper magna enim, vitae fermentum turpis elementum quis. Interdum et malesuada fames ac ante ipsum primis in faucibus.

Curabitur vel sem mi. Proin in lobortis ipsum. Aliquam rutrum tempor ex ac rutrum. Maecenas nunc nulla, placerat at eleifend in, viverra etos sem. Nam sagittis lacus metus, dignissim blandit magna euismod eget. Suspendisse a nisl lacus. Phasellus eget augue tincidunt, sollicitudin lectus sed, convallis desto. Pellentesque vitae dui lacinia, venenatis erat sit amet, fringilla felis. Nullam maximus nisi nec mi facilisis.

×

Someone recently bought a

Your cart

×