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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Out of stock
Fmf - 045668 - Factory 4.1 RCT Muffler - Anodized Titanium
FMF
$749.99Fmf - 18212007 - 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...$749.99 -
Out of stock
Fmf - 042330 - Factory 4.1 RCT Muffler - Aluminum
FMF
$599.99Fmf - 18211726 - 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...$599.99 -
Fmf - 043376 - Powercore 4 with Spark Arrestor
FMF
$399.99Fmf - 18212016 - Powercore 4 with Spark ArrestorFeaturesDurable stainless steel and aluminum constructionAdvanced packing material for maximum longevityRemovable spark arrestor...$399.99 -
Fmf - 042327 - PowerCore 4 HEX Muffler
FMF
$399.99Fmf - 18211723 - 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 - 045647 - Factory 4.1 RCT Muffler - Aluminum
FMF
$549.99Fmf - 18212000 - 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...$549.99 -
Fmf - 024062 - Powercore 2.1 Muffler - Aluminum
FMF
$239.99Fmf - 18211706 - 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 -
Out of stock
Fmf - 025173 - Q Muffler
FMF
$219.99Fmf - 18211709 - Q MufflerFeaturesThe U.S. Forest legal spark arrestor will meet the mandated 96dB sound level set by the US Forest ServiceSerious sound deadening qualities and excellent...$219.99 -
Fmf - 024060 - Powercore 2.1 Muffler - Titanium
FMF
$449.99Fmf - 18211704 - Powercore 2.1 Muffler - TitaniumFeaturesSmooth power curve throughout the RPM rangeLarge diameter canister for more tenability and longer lasting packing lifeDelivers a crisp,...$449.99 -
Fmf - 042388 - Q4 Muffler
FMF
$449.99Fmf - 18212028 - Q4 MufflerFeaturesTwin-stage core design for lower sound output and extended life of packing materialComes standard with spark arrestorSpecsProduct NameMufflerRiding...$449.99 -
Fmf - 041597 - Q4 Muffler
FMF
$449.99Fmf - 18212029 - Q4 MufflerFeaturesTwin-stage core design for lower sound output and extended life of packing materialComes standard with spark arrestorSpecsTypeSlip-OnUnitsEachModelQ4Riding...$449.99 -
Fmf - 042383 - Factory 4.1 Muffler
FMF
$349.99Fmf - 18212023 - Factory 4.1 MufflerFeaturesThe lightest mufflers availableSuperior power and performance - horsepower improved throughout the rpm rangeFeature exclusive proprietary Chamber Core...$349.99 -
Out of stock
Fmf - 042382 - Factory 4.1 Muffler
FMF
$299.99Fmf - 18212022 - Factory 4.1 MufflerFeaturesThe lightest mufflers availableSuperior power and performance - horsepower improved throughout the rpm rangeFeature exclusive proprietary Chamber Core...$299.99 -
Fmf - 042387 - Powercore 4 Muffler
FMF
$399.99Fmf - 18212027 - Powercore 4 MufflerFeaturesComputer-designed and dyno-tested for every 4-stroke applicationEnhanced sonic evacuation delivers a higher flow of exhaust gases, which increases powerA...$399.99 -
Fmf - 041596 - Powercore 4 Muffler
FMF
$399.99Fmf - 18212026 - Powercore 4 MufflerFeaturesDurable stainless steel and aluminum constructionAdvanced packing material for maximum longevityRemovable spark arrestor includedSpecsEnd Cap...$399.99 -
Fmf - 041595 - Factory 4.1 Muffler
FMF
$349.99Fmf - 18212021 - Factory 4.1 MufflerFeaturesThe lightest mufflers availableSuperior power and performance - horsepower improved throughout the rpm rangeFeature exclusive proprietary Chamber Core...$349.99 -
Fmf - 025183 - Factory Fatty Pipe
FMF
$299.99Fmf - 18201683 - 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 - 025182 - Fatty Pipe
FMF
$299.99Fmf - 18201682 - Fatty PipeFeaturesTru-Flo stamping process ensures a perfect fit and optimum performanceConstructed of strong 19-gauge steel with a nickel-plated finishSpecsProduct NameHead...$299.99 -
Fmf - 025181 - Turbinecore 2.1 Muffler
FMF
$219.99Fmf - 18211759 - 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...$219.99 -
Fmf - 025260 - Turbinecore 2 Silencer
FMF
$219.99Fmf - 18211949 - 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 -
Fmf - 040678 - 94dB Spark Arrestor Insert - 4.1 RCT
FMF
$39.99Fmf - 18611097 - 94dB Spark Arrestor Insert - 4.1 RCTFeaturesSpecsProduct NameScreen InsertRiding StyleOff-RoadTypeSpark ArrestorMaterialStainless SteelModelFactory 4.1ModelFactory 4.1 RCTUnitsEach$39.99 -
Out of stock
Fmf - 041607 - Megabomb Header
FMF
$474.99Fmf - 18220528 - Megabomb HeaderFeaturesSpecsMaterialTitaniumDesign/Configuration1-Into-1 SystemModelMegaBombProduct NameHeaderUnitsEachRiding StyleOff-RoadFitment2022-2024HondaCRF250R$474.99 -
Out of stock
Fmf - 043364 - Factory 4.1 RCT Muffler - Aluminum
FMF
$599.99Fmf - 18211857 - 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...$599.99 -
Fmf - 045640 - MegaBomb Header
FMF
$474.99Fmf - 18220494 - 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 -
Fmf - 025231 - Turbinecore 2.1 Muffler
FMF
$269.99Fmf - 18211864 - 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 - 041606 - Megabomb Header
FMF
$374.99Fmf - 18220527 - Megabomb HeaderFeaturesSpecsModelMegaBombDesign/Configuration1-Into-1 SystemMaterialStainless SteelUnitsEachRiding StyleOff-RoadProduct NameHeaderFitment2022-2024HondaCRF250R$374.99 -
Fmf - 041577 - MegaBomb Header
FMF
$374.99Fmf - 18220490 - 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 - 024077 - Exhaust Factory Fatty Pipe
FMF
$299.99Fmf - 18202013 - Exhaust Factory Fatty PipeFeatures19 Gauge steel used for the header portionHand pounded seams for smooth flow transitionsO-rings IncludedSpecsMaterialSteelRiding...$299.99 -
Fmf - 041612 - 4.1 RCT Exhaust System
FMF
$1,049.99Fmf - 18202002 - 4.1 RCT Exhaust SystemFeaturesIn addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving...$1,049.99 -
Fmf - 024068 - Fatty Pipe
FMF
$289.99Fmf - 18201827 - Fatty PipeFeaturesTru-Flo stamping process ensures a perfect fit and optimum performanceConstructed of strong 19-gauge steel with a nickel-plated...$289.99 -
Fmf - 043373 - Factory 4.1 RCT Muffler - Anodized Titanium
FMF
$749.99Fmf - 18211959 - 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...$749.99 -
Fmf - 025263 - Fatty Pipe
FMF
$299.99Fmf - 18220489 - Fatty PipeFeaturesThe Fatty broadens and smooths out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-revNo matter...$299.99 -
Fmf - 042376 - Factory 4.1 RCT Muffler - Anodized Titanium
FMF
$749.99Fmf - 18211955 - 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...$749.99 -
Out of stock
Fmf - 025233 - Turbinecore 2.1 Muffler
FMF
$269.99Fmf - 18211866 - 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 - 041578 - Q4 HEX Muffler
FMF
$449.99Fmf - 18211952 - 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 -
Fmf - 043365 - Factory 4.1 RCT Muffler - Anodized Titanium
FMF
$749.99Fmf - 18211858 - 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...$749.99 -
Fmf - 040691 - Heat Shield
FMF
$89.99Fmf - 18611607 - Heat ShieldFeaturesSpecsUnitsEachProduct NameHeat ShieldMaterialTitaniumRiding StyleStreetFitment2019-2026YamahaYZ250F2018-2025YamahaYZ450F2020-2026YamahaYZ250FX2019-2024YamahaYZ450FX$89.99 -
Fmf - 042338 - MegaBomb Header - Stainless Steel - '16-'18 KX450F
FMF
$374.99Fmf - 18220445 - MegaBomb Header - Stainless Steel - '16-'18 KX450FFeaturesImproved bottom to mid-range powerLess susceptible to damage than a longer headerEffectively reduces sound output by as much...$374.99 -
Fmf - 041604 - Factory 4.1 RCT Exhaust - Aluminum
FMF
$1,049.99Fmf - 18201993 - Factory 4.1 RCT Exhaust - AluminumFeaturesInternal ducts in the chambers of the RCT system increase internal volume for improved exhaust flow, resulting in power gains throughout the...$1,049.99 -
Fmf - 041586 - PowerCore 4 HEX Muffler
FMF
$399.99Fmf - 18113799 - PowerCore 4 HEX MufflerFeaturesDurable stainless steel and aluminum constructionSpace Age internal packing material for maximum longevityInternal shape of core uses Hi-Flo...$399.99 -
Out of stock
Fmf - 025214 - Powercore 2.1 Shorty Muffler
FMF
$449.99Fmf - 18211817 - 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 – 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.