Description

The FMF Q4 HEX Muffler delivers measurable power gains across the entire RPM range while reducing weight and noise—letting you feel the performance improvement rather than just hear it. Its sophisticated multi-stage chamber design and proprietary packing material provide the sound suppression you need for off-road compliance without sacrificing flow or throttle response. Whether you’re pushing hard on the track or tackling technical terrain, the Q4’s rugged construction and integrated spark arrestor are engineered for sustained performance.