The FMF Q4 HEX Slip-On Muffler is built for riders who want strong, usable power with controlled sound for off-road and enduro riding. Designed to meet FIM World Enduro sound regulations, it’s lighter than stock and includes a spark arrestor for trail-ready compliance.
The FMF Q4 HEX Slip-On Muffler is the smart upgrade when you want a performance exhaust without excessive noise. With a focus on off-road durability and controlled sound output, it helps you ride more places with fewer restrictions while still delivering noticeable power gains across the entire RPM range.
If you’re tired of a heavy stock muffler, inconsistent throttle response, or sound limits at organized events, the Q4 HEX addresses it with a lighter, rugged design engineered for endurance use. It’s also supplied with a spark arrestor, making it a great choice for trail and forestry areas where regulations apply.
