fmf

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 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...

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

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

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

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

Superior power and performance - horsepower improved throughout the rpm rangeFactory Forward Engineering centralizes mass, improves handlingCustomi...

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...

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

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

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...

Overall increase in power and torqueDurable stainless steel and aluminum constructionSpace Age internal packing material for maximum longevityInter...

If performance is your priority, the Factory 4.1 is the exhaust for youUsed by Factory teams such as KTM, Epic Can-Am and Rath RacingAccepts option...

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

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

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

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

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

FMF developed the PowerCore 4 to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is...

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

The Q series features advanced engineering to precisely locate baffles and chambers to absorb soundLess mass to enhance power-to-weight ratioQuiet ...

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

The Q4 employs intricate chambers, baffles and proprietary multistage packing materialWith the Q4 you don’t need to hear the power, just feel the p...