Home » FMF Q4 HEX S/A Slip-On Exhaust - Kawasaki KX450 / X / SR (2019-2023)
FMF Q4 HEX S/A Slip-On Exhaust Kawasaki KX450 / X / SR (2019-2023)
FMF Racing

FMF Q4 HEX S/A Slip-On Exhaust - Kawasaki KX450 / X / SR (2019-2023)

SKU: FMF042368
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Out of stock
$449.99

Product details

  • Type Exhaust
  • MPN 042368
Compatible Models +
Make & Model Year Range
KAWASAKI KX 450F 2019 - 2023
KAWASAKI KX 450X 2021 - 2023
KAWASAKI KX 450SR 2022 - 2023
"KAWASAKI KX 450F 2019", "KAWASAKI KX 450F 2020", "KAWASAKI KX 450F 2021", "KAWASAKI KX 450F 2022", "KAWASAKI KX 450F 2023", "KAWASAKI KX 450X 2021", "KAWASAKI KX 450X 2022", "KAWASAKI KX 450X 2023", "KAWASAKI KX 450SR 2022", "KAWASAKI KX 450SR 2023"

Overview

Ride farther, ride longer, and ride legal with the FMF Q4 HEX Slip-On Exhaust for your Kawasaki KX 450, X, or SR (2019–2023). Built to meet USFS and FIM World Enduro sound requirements, the Q4 combines stealthy sound control with proven power gains across the RPM range. It's FMF’s most advanced quiet system—lightweight, durable, and designed for real off-road use.

Key Features

  • Low Sound, High Output: Reduces noise while increasing horsepower and torque.
  • USFS Approved: Includes spark arrestor and meets strict noise regulations.
  • Durable Off-Road Build: Stainless steel midpipe and endcap resist abuse on rugged trails.
  • Lightweight Construction: Aluminum canister keeps weight down to just 5.5 lbs.
  • Easy Compatibility: Fits stock or FMF headers—bolt-on performance, no hassle.
  • Made in the USA: 100% built in FMF’s California factory.

Specifications

  • Fitment: Kawasaki KX 450 / X / SR (2019–2023)
  • Item ID: 042368
  • Type: Slip-On
  • Construction: Aluminum canister
  • Midpipe: Stainless steel
  • End Cap: Stainless steel
  • Spark Arrestor: Screen insert included
  • Quiet Insert: Included
  • Weight: 5.5 lbs.
  • Use: Closed Course Only

Go quiet without giving up performance—the FMF Q4 HEX is your go-to for sound-sensitive rides and all-day off-road endurance.

Shipping Information

We strive to get your order to you as quickly as possible! Here’s what you need to know about our shipping policies:

Fast Shipping: Most items ship within the same day or within 48 hours of your order being placed.

Custom Orders: Please allow additional processing time for custom or made-to-order products.

Flat Rate Shipping: Enjoy $9 Flat Rate Shipping on all standard orders.

Free Shipping:

Orders over $90 qualify for FREE shipping!

Always FREE shipping on:

  • ASV Levers
  • Rough Country Products
  • S3 Power Sports Products

No Sales Tax Outside Minnesota: Since we only have a tax nexus in Minnesota, sales tax is only collected on orders shipped within MN.

Customers with shipping addresses outside Minnesota automatically save on sales tax—just one more way to get great value!

(Please consult your local tax policies for compliance in your area.)

We’re committed to delivering your products efficiently and reliably. Thank you for choosing us!

Let customers speak for us

from 9 reviews
Fast shipping, accurate order

AND THANK YOU FOR ALL THE AWESOME SCHWEEEET STICKERS !!!! Y’all rock & stuff

SEAN SELMAN
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