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!
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from 9 reviews
Fast shipping, accurate order
AND THANK YOU FOR ALL THE AWESOME SCHWEEEET STICKERS !!!! Y’all rock & stuff
Excellent service and reached out to make sure I got what I needed. Got the lever in under a week here in Kentucky. Actually ordered another for another bike because of service.
I was really hoping for this lever to help my 4 year old on his stacyc and it made a huge difference. Closer to the bars, easier for him to squeeze as he is 4 and all around great lever. Super happy with the purchase.
