fmf

Includes MegaBomb headerThe Factory 4.1 RCT incorporates FMF Resonance Chamber Technology™ both internally and externallyShorter overall length tha...

The ultimate power boosterImproved bottom to mid-range powerProduce the low end of a longer header and the top end of a shorter headerEffectively r...

Used for a single sided exhaust system

Race tested, smooth power curve throughout RPM rangeLarge diameter canister for longer packing lifeLighter than stockUtilizes exclusive FMF "Turbin...

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power outputInternal ducts in the ...

The ultimate power boosterImproved bottom to mid-range powerLess susceptible to damage than a longer headerEffectively reduces sound output by as m...

Computer designed and dyno tested to make power gains where each machine needs them the mostTru-Flo stamping process ensures a perfect fit and opti...

The FMF Gnarly pipe focuses on increasing the lower RPM horsepower and torque to get you out of the toughest terrainWhen looking to add 4-stroke tr...

Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatib...

Computer designed and dyno tested to make power gains where each machine needs them the mostTru-Flo stamping process ensures a perfect fit and opti...

Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatib...

The FMF Gnarly pipe focuses on increasing the lower RPM horsepower and torque to get you out of the toughest terrainWhen looking to add 4-stroke tr...

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’ cr...

Closed course use only.

Closed course use only.

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power outputInternal ducts in the ...

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power outputInternal ducts in the ...

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power outputInternal ducts in the ...

RCT (Resonance Chamber Technology) features a patented core shape that lowers decibels while maintaining maximum power outputInternal ducts in the ...

Less sound equals more groundMeets FIM World Enduro sound regulationsPower gains throughout the entire rpm rangeSpark arrestor includedPounds light...

The ultimate power booster featuring exclusive Ti-Metal constructionImproved bottom to mid-range powerProduce the low end of a longer header and th...

Hi-Flo end cap boosts all-around performanceComputer-designed and dyno-tested for every 4-stroke applicationEnhanced sonic evacuation delivers a hi...

The ultimate power booster featuring exclusive Ti-Metal constructionImproved bottom to mid-range powerProduce the low end of a longer header and th...

Utilize FMF's patented module precisely located at the initial stage of the headerPosition "Bomb" increases performance; horsepower is increased as...