The FMF Q4 HEX Slip-On Muffler is built for riders who want usable power and durability without an overly loud exhaust note. Its intricate chamber and baffle design, combined with FMF’s proprietary multi-stage packing material, helps reduce sound while still delivering power gains throughout the entire RPM range—so you can feel the power without needing to hear it.
Designed for off-road endurance, the Q4 HEX is a great upgrade when you’re looking to shed weight compared to stock and add a tougher, performance-focused muffler for demanding trail and track conditions. A spark arrestor is included, making it a practical choice for many riding areas that require it.
Key features:
✅ Intricate chambers, baffles and proprietary multi-stage packing material
✅ Power gains throughout the entire RPM range
✅ Spark arrestor included
Benefits of use:
🔹 Quieter performance-focused setup (“less sound equals more ground”)
🔹 Lightweight construction compared to many stock systems for improved feel
🔹 Rugged design intended for long-term off-road use
Technical specifications (if needed):
📌 Brand: FMF
📌 Model: Q4 HEX
📌 Type: Slip-On muffler
📌 Materials: Aluminum muffler; stainless steel end cap/midpipe components
📌 Finish/Color: Raw
📌 Vendor part number: 044442
Why choose this product?
⭐ Proven FMF build quality and made in the U.S.A.
⭐ Designed for riders who want performance with reduced sound output
⭐ Includes spark arrestor for added convenience and compliance where required
Note: Will not pass 2025 FIM sound regulation.
