Description

If you’re running off-road or track applications where exhaust noise and backpressure directly impact performance, the FMF Q4 delivers championship-proven silencing without sacrificing flow. Engineered through years of competitive racing, this muffler uses advanced chamber design and multi-stage packing to reduce sound while maintaining the scavenging characteristics your engine needs. Whether you’re upgrading a stock system or pairing it with a performance header, the Q4 gives you race-tested reliability in a bolt-on package.