The FMF Q4 HEX Slip-On Muffler is designed to deliver a noticeable performance boost without the excessive sound that can cut riding days short. Using intricate chambers, baffles, and FMF’s proprietary multi-stage packing material, the Q4 helps improve power throughout the entire RPM range—so you can feel the pull and traction where it matters most.
If you ride trails, enduro, or off-road terrain where sound limits and practicality matter, this slip-on muffler is a smart upgrade. It’s lighter than stock, built to handle off-road abuse, and includes a spark arrestor for added trail compliance and peace of mind.
Key features:
✅ Intricate chambers and baffles with proprietary multi-stage packing
✅ Power gains throughout the entire RPM range
✅ Spark arrestor included
Benefits of use:
🔹 Reduced sound helps you stay welcome on more riding areas (“less sound equals more ground”)
🔹 Lighter-than-stock construction improves overall bike feel and handling
🔹 Rugged design built for off-road endurance and long-term reliability
Technical specifications (if needed):
📌 Type: Slip-On muffler
📌 Materials: Aluminum muffler canister; stainless steel end cap and pipe
📌 Finish/Color: Raw
📌 Model: Q4 HEX
📌 Brand: FMF
📌 Vendor part number: 044452
Why choose this product?
⭐ Proven FMF build quality and off-road focused engineering (Made in the U.S.A.)
⭐ Balanced upgrade: performance you can feel with a quieter, more controlled exhaust note
⭐ Includes a spark arrestor for trail-ready use (Note: will not pass 2025 FIM sound regulation)
