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

Factory Forward Engineering centralizes mass, improves handlingMade from premium quality American materialsCustomize with performance tuning insert...

Factory Forward Engineering centralizes mass, improves handlingMade from premium quality American materialsCustomize with performance tuning insert...

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

The Factory 4.1 RCT incorporates the FMF Resonance Chamber Technology™ both internally and externallyIn addition, we achieve a shorter overall leng...

The muffler comes complete and does not require any extra parts for installation on the vehicle, all included components are listed in the user manual

Massive Power gains throughout the RPM rangeHuge weight savingsNew RTS (Rapid Tuning System)

Overall increase in power and torqueInternal shape of core use Hi-Flo technologyIncludes removable spark arrestor

An excellent choice for tight tracks and supercross track applicationsTaking the proven success of the Powercore 2, the Powercore 2 Shorty has a s...

The lightweight extruded aluminum oval canister mated to a perforated core puts this silencer is above the competitionThe Powercore 2 silencer prov...

The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externallyIn addition, FMF achieves a shorter overall leng...

The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externallyIn addition, FMF achieves a shorter overall leng...

The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externallyIn addition, FMF achieves a shorter overall leng...

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...

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

Composed of fine, blended, interwoven fiberglass fibersMade to conform to FMF's high heat-resistant specificationsProvides optimum performance and ...

Display comes with corresponding wash pugs

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 most popular 2-stroke silencers in FMF's arsenalThe elliptically shaped bodies with perforated core perform well in any conditionEquipped with ...

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...

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

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

FMF's Fatty Gold Series pipe broadens the powerband and provides a healthy power increase everywhereImproved throttle response, a linear powerband ...