FMF
FMF Racing is a globally respected performance brand specializing in high-output motorcycle exhaust systems and race-developed components. With deep roots in motocross, off-road and competitive riding, FMF exhausts are engineered to increase horsepower, sharpen throttle response and deliver a signature aggressive sound. Riders trust FMF for race-proven durability, lightweight construction and consistent real-world performance gains. The FMF name is synonymous with competition, innovation and uncompromising exhaust technology.
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Fmf - 024067 - Turbinecore 2.1 Muffler
FMF
$269.99Fmf - 18211791 - Turbinecore 2.1 MufflerFeaturesThe 2.1 utilizes a shape inspired by the 4.1 systemUtilizes exclusive FMF "Turbine Dampening System"U.S. Forest Service legal...$269.99 -
Fmf - 025199 - Powercore 2 Silencer
FMF
$199.99Fmf - 18211764 - Powercore 2 SilencerFeaturesThe elliptically shaped bodies with perforated core perform well in any conditionEquipped with a Performance Flow end cap and nickel-plated front...$199.99 -
Fmf - 025221 - Fatty Pipe
FMF
$299.99Fmf - 18201792 - Fatty PipeFeaturesTru-Flo stamping process ensures a perfect fit and optimum performanceConstructed of strong 19-gauge steel with a nickel-plated...$299.99 -
Fmf - 025219 - Factory Fatty Pipe
FMF
$299.99Fmf - 18201791 - Factory Fatty PipeFeaturesBroadens and smooths out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-revNo matter what...$299.99 -
Fmf - 025224 - Factory Fatty Big Bore Exhaust
FMF
$299.99Fmf - 18201794 - Factory Fatty Big Bore ExhaustFeatures19-gauge steel used on the header portion for optimum strength and durability; 20-gauge steel on body and rear section for increased weight...$299.99 -
Fmf - 045620 - MegaBomb Header
FMF
$374.99Fmf - 18220480 - MegaBomb HeaderFeaturesImproved bottom to mid-range powerProduce the low end of a longer header and the top end of a short headerLess susceptible to damage than a long headerRuns...$374.99 -
Fmf - 045628 - Factory 4.1 RCT Muffler - Aluminum
FMF
$674.99Fmf - 18211920 - Factory 4.1 RCT Muffler - AluminumFeaturesIn addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward...$674.99 -
Fmf - 044445 - Factory 4.1 RCT Muffler - Anodized Titanium
FMF
$849.99Fmf - 18211840 - Factory 4.1 RCT Muffler - Anodized TitaniumFeaturesIn addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory...$849.99 -
Fmf - 044441 - PowerCore 4 HEX Muffler
FMF
$399.99Fmf - 18211836 - PowerCore 4 HEX MufflerFeaturesDurable stainless steel and aluminum constructionSpace Age internal packing material for maximum longevityInternal shape of core uses Hi-Flo...$399.99 -
Fmf - 045627 - Q4 HEX Muffler
FMF
$569.99Fmf - 18211919 - Q4 HEX MufflerFeaturesWith the Q4 you don’t need to hear the power, just feel the power!Less sound equals more groundPower gains throughout the entire rpm rangeSpark arrestor...$569.99 -
Fmf - 025249 - Turbinecore 2.1 Muffler
FMF
$269.99Fmf - 18211911 - Turbinecore 2.1 MufflerFeaturesThe 2.1 utilizes a shape inspired by the 4.1 systemUtilizes exclusive FMF "Turbine Dampening System"U.S. Forest Service legal...$269.99 -
Fmf - 042367 - PowerCore 4 HEX Muffler
FMF
$399.99Fmf - 18211886 - PowerCore 4 HEX MufflerFeaturesDurable stainless steel and aluminum constructionSpace Age internal packing material for maximum longevityInternal shape of core uses Hi-Flo...$399.99 -
Fmf - 025255 - Powercore 2.1 Shorty Muffler
FMF
$449.99Fmf - 18211916 - Powercore 2.1 Shorty MufflerFeaturesWith their lightweight titanium or extruded aluminum oval canisters mated to a perforated core, these silencers are above the...$449.99 -
Fmf - 044455 - Factory 4.1 RCT Muffler - Anodized Titanium
FMF
$849.99Fmf - 18211885 - Factory 4.1 RCT Muffler - Anodized TitaniumFeaturesIn addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory...$849.99 -
Out of stock
Fmf - 044452 - Q4 HEX Muffler
FMF
$449.99Fmf - 18211882 - Q4 HEX MufflerFeaturesWith the Q4 you don’t need to hear the power, just feel the power!Less sound equals more groundPower gains throughout the entire rpm rangeSpark arrestor...$449.99 -
Out of stock
Fmf - 045625 - MegaBomb Header
FMF
$474.99Fmf - 18220485 - MegaBomb HeaderFeaturesImproved bottom to mid-range powerProduce the low end of a longer header and the top end of a short headerLess susceptible to damage than a long headerRuns...$474.99 -
Out of stock
Fmf - 045622 - MegaBomb Header
FMF
$374.99Fmf - 18220482 - MegaBomb HeaderFeaturesImproved bottom to mid-range powerProduce the low end of a longer header and the top end of a short headerLess susceptible to damage than a long headerRuns...$374.99 -
Fmf - 025152 - Gnarly Pipe
FMF
$299.99Fmf - 18201376 - Gnarly PipeFeaturesWhen looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe to withstand the harsh elements, this is the pipe for youStrong and rugged,...$299.99 -
Fmf - 025269 - Gnarly Exhaust - Beta
FMF
$299.99Fmf - 18201946 - Gnarly Exhaust - BetaFeaturesWhen looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe to withstand the harsh elements, this is the pipe for youStrong and...$299.99 -
Fmf - 044404 - PowerCore 4 HEX Muffler
FMF
$399.99Fmf - 18211534 - PowerCore 4 HEX MufflerFeaturesDurable stainless steel and aluminum constructionSpace Age internal packing material for maximum longevityInternal shape of core uses Hi-Flo...$399.99 -
Fmf - 025270 - Gnarly Exhaust - Beta
FMF
$299.99Fmf - 18201947 - Gnarly Exhaust - BetaFeaturesWhen looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe to withstand the harsh elements, this is the pipe for youStrong and...$299.99 -
Fmf - 025268 - Factory Fatty Pipe
FMF
$299.99Fmf - 18201945 - Factory Fatty PipeFeaturesBroadens and smooths out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-revNo matter what...$299.99 -
Fmf - 025273 - Turbinecore 2.1 Muffler
FMF
$269.99Fmf - 18211983 - Turbinecore 2.1 MufflerFeaturesThe 2.1 utilizes a shape inspired by the 4.1 systemUtilizes exclusive FMF "Turbine Dampening System"U.S. Forest Service legal...$269.99 -
Fmf - 025267 - Turbinecore 2.1 Muffler
FMF
$269.99Fmf - 18211980 - Turbinecore 2.1 MufflerFeaturesThe 2.1 utilizes a shape inspired by the 4.1 systemUtilizes exclusive FMF "Turbine Dampening System"U.S. Forest Service legal statusSpecsEnd Cap...$269.99 -
Fmf - 042308 - PowerCore 4 HEX Muffler
FMF
$399.99Fmf - 18211520 - PowerCore 4 HEX MufflerFeaturesDurable stainless steel and aluminum constructionSpace Age internal packing material for maximum longevityInternal shape of core uses Hi-Flo...$399.99 -
Fmf - 042309 - PowerCore 4 HEX Muffler
FMF
$399.99Fmf - 18211521 - PowerCore 4 HEX MufflerFeaturesDurable stainless steel and aluminum constructionSpace Age internal packing material for maximum longevityInternal shape of core uses Hi-Flo...$399.99 -
Fmf - 025258 - Powercore 2 Silencer
FMF
$199.99Fmf - 18211947 - Powercore 2 SilencerFeaturesThe elliptically shaped bodies with perforated core perform well in any conditionEquipped with a Performance Flow end cap and nickel-plated front...$199.99 -
Fmf - 041587 - Factory 4.1 RCT Muffler - Anodized Titanium
FMF
$749.99Fmf - 18211978 - Factory 4.1 RCT Muffler - Anodized TitaniumFeaturesShorter overall length that is less susceptible to crash damageMassive Power gains throughout the RPM range.Huge weight...$749.99 -
Fmf - 014803 - Exhaust O-Rings
FMF
$12.99Fmf - 18600607 - Exhaust O-RingsFeaturesSpecsMaterialRubberProduct NameO-RingTypeExhaustUnitsPairRiding StyleOff-RoadFitment2005-2020KTM125 SX-F2005-2020KTM300 XC-W Six Days2008-2015KTM300...$12.99 -
Fmf - 044459 - Megabomb Header with Midpipe - Titanium
FMF
$524.99Fmf - 18220505 - Megabomb Header with Midpipe - TitaniumFeaturesImproved bottom to mid-range powerProduce the low end of a longer header and the top end of a shorter headerEffectively reduces sound...$524.99 -
Fmf - 041580 - Mini PowerCore 4 Slip-On Muffler - with Spark Arrestor
FMF
$239.99Fmf - 18211963 - Mini PowerCore 4 Slip-On Muffler - with Spark ArrestorFeaturesAircraft grade aluminum canisterYou will swear the motor has been bored and stroked with the first twist of the...$239.99 -
Fmf - 042378 - Factory 4.1 RCT Exhaust - Titanium
FMF
$1,199.99Fmf - 18201901 - Factory 4.1 RCT Exhaust - TitaniumFeaturesInternal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the...$1,199.99 -
Fmf - 025265 - Gnarly Exhaust - Sherco
FMF
$299.99Fmf - 18201944 - Gnarly Exhaust - ShercoFeaturesWhen looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe to withstand the harsh elements, this is the pipe for youStrong...$299.99 -
Fmf - 025272 - Powercore 2.1 Muffler - Aluminum
FMF
$239.99Fmf - 18211982 - Powercore 2.1 Muffler - AluminumFeaturesSmooth power curve throughout the RPM rangeLarge diameter canister for more tenability and longer lasting packing lifeDelivers a crisp,...$239.99 -
Fmf - 025271 - Factory Fatty Pipe
FMF
$299.99Fmf - 18211981 - Factory Fatty PipeFeaturesBroadens and smooths out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-revNo matter what...$299.99 -
Fmf - 025262 - Turbinecore 2 Silencer
FMF
$219.99Fmf - 18211951 - Turbinecore 2 SilencerFeaturesStraight-through design of the spark arrestor canister and the Performance Flow stainless steel end cap ensure strength, durability and unrestricted...$219.99 -
Out of stock
Fmf - 041583 - PowerBomb Header
FMF
$249.99Fmf - 18220499 - PowerBomb HeaderFeaturesPosition "Bomb" increases performance; horsepower is increased as much as 10%Act as "pre-muffler" helping to lower the decibel outputThe expansion and...$249.99 -
Fmf - 042310 - PowerCore 4 HEX Muffler
FMF
$399.99Fmf - 18211522 - PowerCore 4 HEX MufflerFeaturesDurable stainless steel and aluminum constructionSpace Age internal packing material for maximum longevityInternal shape of core uses Hi-Flo...$399.99 -
Fmf - 025261 - Powercore 2 Silencer
FMF
$199.99Fmf - 18211950 - Powercore 2 SilencerFeaturesThe elliptically shaped bodies with perforated core perform well in any conditionEquipped with a Performance Flow end cap and nickel-plated front...$199.99 -
Fmf - 041584 - Powercore 4 Muffler
FMF
$359.99Fmf - 18211966 - Powercore 4 MufflerFeaturesAluminum construction and stainless steel Hi-Flo end caps make for the perfect balance of performance and strengthRemovable spark arrestor...$359.99
FMF – High-Performance Exhaust Systems and Racing Components
FMF Racing has built its legacy through decades of direct involvement in professional motocross, supercross, desert racing and off-road competition. Every FMF exhaust system is developed using extensive dyno testing, track feedback and real-world race data to extract maximum performance from modern and classic motorcycle engines. This race-first approach allows FMF to deliver exhaust solutions that improve airflow efficiency, engine response and overall power delivery without sacrificing reliability.
FMF motorcycle exhaust pipes, headers and mufflers are engineered to increase torque and horsepower across usable RPM ranges while reducing overall system weight. Tuned silencer designs, precision-welded headers and lightweight materials help riders achieve stronger acceleration, improved throttle control and a more responsive riding experience. FMF also supports long-term performance with exhaust repack kits, replacement components and accessories designed to maintain optimal sound control and efficiency.
Trusted by factory race teams, professional riders and serious enthusiasts worldwide, FMF continues to set the benchmark in motorcycle exhaust performance. Whether upgrading a trail bike, motocross machine or off-road racer, FMF exhaust systems deliver proven power gains, aggressive sound and the durability required for hard riding. For riders who demand performance backed by racing heritage, FMF remains a top-tier exhaust solution.