Home » FMF Q4 HEX S/A Slip-On Exhaust - Honda CRF450X (2019-2026)
FMF Q4 HEX S/A Slip-On Exhaust - Honda CRF450X (2019-2026)
FMF Racing

FMF Q4 HEX S/A Slip-On Exhaust - Honda CRF450X (2019-2026)

SKU: FMF041578
No reviews
In stock
$499.99
Product details
  • Type Exhaust
  • MPN 041578
Compatible Models +
Make & Model Year Range
HONDA CRF450X 2019 - 2025

Overview

The FMF Q4 HEX Slip-On Exhaust delivers trail-legal sound levels without sacrificing performance. Engineered for off-road riders who want maximum power with minimal noise, this system features advanced baffle technology and multi-stage packing to deliver strong gains across the RPM range—all while keeping you compliant with USFS sound regulations.

Key Features

  • Low Sound, High Performance: Power you can feel without the noise that gets trails shut down.
  • USFS Approved Spark Arrestor: Ride legally on public lands with built-in forest service compliance.
  • Built for Off-Road Abuse: Rugged aluminum and stainless steel construction stands up to harsh conditions.
  • Lightweight Upgrade: Weighs significantly less than most stock systems for improved handling.
  • Quiet Insert Included: Meets USFS and FIM World Enduro sound regulations right out of the box.
  • Made in the USA: Built 100% in FMF's Southern California facility.
  • Compatible with FMF or OEM Header: Flexible fitment for custom or stock setups.

Specifications

  • Type: Slip-On
  • Configuration: Single
  • Construction: Aluminum
  • Finish: Natural
  • Midpipe: Stainless Steel
  • Endcap: Stainless Steel
  • Spark Arrestor: Screen Insert (included)
  • Quiet Insert: Included
  • Weight: 5.8 lbs.
  • Carb Warning: No

If you're looking for a tough, trail-ready exhaust that keeps the noise down and the power up, the FMF Q4 HEX is your go-to slip-on.

WARNING: Closed Course Use Only

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

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