The FMF Q4 HEX S/A Slip-On Muffler is designed for riders who want stronger, more responsive performance without excessive noise. Its off-road-focused, rugged build stands up to long days on the trail, while delivering power gains throughout the entire RPM range to help your bike pull cleaner and feel more lively.
If you ride in areas where sound control and trail safety matter, the included spark arrestor and compliance with USFS and FIM World Enduro sound regulations make this slip-on a practical upgrade. It’s made in the USA and intended for closed course competition use only (note: it will not pass the 2025 FIM sound regulation).
Key features:
✅ Less sound equals more ground
✅ Spark arrestor included
✅ Meets USFS and FIM World Enduro sound regulations
✅ Power gains throughout the entire RPM range
✅ Rugged design for off-road endurance
✅ Made in the USA
Benefits of use:
🔹 More usable power and improved rideability across the rev range
🔹 Trail- and enduro-friendly setup thanks to included spark arrestor
🔹 Durable construction designed to handle tough off-road conditions
Technical specifications (if needed):
📌 Brand: FMF
📌 Model: Q4 HEX
📌 Type: Slip-On muffler
📌 Muffler material: Aluminum
📌 End cap material: Stainless steel
📌 Pipe material: Stainless steel
📌 Finish/Color: Anodized gray
📌 Vendor part number: 042410
Why choose this product?!
⭐ Proven FMF off-road exhaust design focused on durability and real-world performance
⭐ Great solution when you want performance gains without overly loud output
⭐ Spark arrestor included for a more complete, ready-to-install setup
