FMF Racing

The straight through design of the spark arrestor canister and the performance flow stainless steel end cap ensures strength, durability and most importantly, track and trail proven unrestricted...

The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams and it shares many of the same characteristics with its craftsmanship and material qualityBroadens and smooths...

The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams and it shares many of the same characteristics with its craftsmanship and material qualityBroadens and smooths...

The straight through design of the spark arrestor canister and the performance flow stainless steel end cap ensures strength, durability and most importantly, track and trail proven unrestricted...

Built to provide excellent power for today’s tracks geared toward 4-stroke machinesSmooth power curve throughout the RPM rangeLarge diameter canister for more tenability and longer lasting packing...

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power outputInternal ducts in the chambers of the RCT system increase internal volume...

The Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externallyShorter overall length that is less susceptible to crash damage and complementary to FMF's Factory...

Hi-Flo end cap boosts all-around performanceComputer designed and dyno-tested for every 4-stroke applicationEnhanced sonic evacuation delivers a higher flow of exhaust gases, which increases powerA...

Utilize FMF's patented module precisely located at the initial stage of the header for specific applicationsPosition of "Bomb" increases performance; horsepower is increased as much as 10%Act as...

Utilize FMF's patented module precisely located at the initial stage of the header for specific applicationsPosition "Bomb" increases performanceHorsepower is increased as much as 10%Act as...

Replacement exhaust strap mounts Does not include O-rings. Not for minis.

Replacement exhaust strap mounts Does not include O-rings. Not for minis.