FMF - Q4 Hex Slip-On Muffler (Honda)

FMF – Q4 Hex Slip-On Muffler (Honda)

The FMF Q4 Hex is FMF’s benchmark for quiet-performance exhaust, built for riders who want real gains without blowing past sound limits. Using a system of internal chambers, baffles, and multistage packing material, the Q4 delivers one of the best balance points between power and low noise of any off-road muffler on the market. It’s lighter than stock, built to take abuse, and comes with a spark arrestor already installed — ready for trails, parks, and anywhere sound requirements matter.

Why We Like It

We like it because it adds usable power in the low to mid range, which makes a real difference when you’re driving out of corners or working through tighter, technical terrain. It also drops some weight compared to stock, and the lower decibel output keeps the bike quiet and smooth without killing performance.

Why It’ll Work for You

This slip-on gives you better throttle response right where you use it most — from initial crack to midrange pull. That helps with acceleration out of turns, climbing hills, and staying controlled in rocky or slow-speed sections. It’s quieter than stock, lighter, and bolts on easily with the spark arrestor already in place, so it fits both trail rules and daily riding needs without extra effort.

Key Features

• Adds power throughout the rpm range, especially low to mid
• Meets USFS and FIM World Enduro sound regulations
• Spark arrestor included
• Lightweight design compared to stock
• Rugged construction built for off-road use
• FMF quiet-performance technology
• Made in the USA