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FMF Dirt Bike 4 Stroke Mufflers

FMF Dirt Bike 4 Stroke Mufflers

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • FMF Q4 HEX Muffler 045646

    FMF Q4 HEX Muffler 045646

    FMF

    $449.99
    The FMF Q4 HEX Muffler delivers measurable power gains across the entire RPM range while cutting weight from your machine—critical advantages whether you're racing competitively or pushing limits on technical terrain. Its sophisticated multi-stage...
    18211999
    SKU:
    18211999
    Availability:
    Ships Same Business Day
    Weight:
    6.30 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    WEIGHT IMPERIAL:
    5.1 LB
    END CAP MATERIAL:
    STAINLESS STEEL
    MUFFLER MATERIAL:
    ALUMINUM
    UNITS:
    EACH
    MODEL:
    Q4 HEX
    MUFFLER COLOR/FINISH:
    RAW
    $449.99
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 045647

    FMF Factory 4.1 RCT Muffler - Aluminum 045647

    FMF

    $549.99
    If you're serious about maximizing output while minimizing rotational mass, the FMF Factory 4.1 RCT delivers measurable power gains across the entire RPM band without compromise. The compact design centralizes weight closer to the engine, improving...
    18212000
    SKU:
    18212000
    Availability:
    Ships Same Business Day
    Weight:
    6.20 LBS
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    MUFFLER COLOR/FINISH:
    RAW
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    $549.99
    Qty in Cart: 0
    Quantity:
    Price:
    $549.99
    Subtotal:
  • FMF Powercore 4 HEX Muffler 045666

    FMF Powercore 4 HEX Muffler 045666

    FMF

    $399.99
    If you're looking to unlock measurable gains in power and torque while maintaining reliability on the track or trail, the FMF Powercore 4 HEX Muffler delivers the flow efficiency you need without compromise. Built with premium stainless steel and...
    18212005
    SKU:
    18212005
    Availability:
    Ships Same Business Day
    Weight:
    7.45 LBS
    MODEL:
    POWERCORE 4 HEX
    MUFFLER MATERIAL:
    ALUMINUM
    UNITS:
    EACH
    END CAP MATERIAL:
    STAINLESS STEEL
    MUFFLER COLOR/FINISH:
    RAW
    TYPE:
    SLIP-ON
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Q4 HEX Muffler 045667 FMF Q4 HEX Muffler 045667

    FMF Q4 HEX Muffler 045667

    FMF

    $449.99
    The FMF Q4 HEX Muffler delivers measurable power gains across the entire RPM range while significantly reducing weight compared to stock units. Its sophisticated chamber and baffle design extracts performance without unnecessary noise, allowing you to...
    18212006
    SKU:
    18212006
    Availability:
    Ships Same Business Day
    Weight:
    7.72 LBS
    MODEL:
    Q4 HEX
    MUFFLER COLOR/FINISH:
    RAW
    RIDING STYLE:
    OFF-ROAD
    END CAP MATERIAL:
    STAINLESS STEEL
    TYPE:
    SLIP-ON
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    MUFFLER MATERIAL:
    ALUMINUM
    PIPE MATERIAL:
    STAINLESS STEEL
    $449.99
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 045668

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 045668

    FMF

    $749.99
    The FMF Factory 4.1 RCT Muffler delivers measurable power gains across the entire RPM band while cutting unnecessary weight from your chassis—a combination that translates directly to faster lap times and improved throttle response. By centralizing mass...
    18212007
    SKU:
    18212007
    Availability:
    Ships Same Business Day
    Weight:
    7.41 LBS
    END CAP MATERIAL:
    CARBON FIBER
    PRODUCT NAME:
    MUFFLER
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    MUFFLER MATERIAL:
    TITANIUM
    $749.99
    Qty in Cart: 0
    Quantity:
    Price:
    $749.99
    Subtotal:
  • FMF Q4 Muffler 042388

    FMF Q4 Muffler 042388

    FMF

    $449.99
    If you're running serious off-road miles, exhaust noise and premature packing degradation will cost you track time and money. The FMF Q4 Muffler delivers championship-proven sound suppression while extending service intervals between repacks—keeping you...
    18212028
    SKU:
    18212028
    Availability:
    Ships Same Business Day
    Weight:
    6.60 LBS
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    MODEL:
    Q4 HEX
    RIDING STYLE:
    OFF-ROAD
    PRODUCT NAME:
    MUFFLER
    $449.99
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    Subtotal:
  • FMF Powercore 4 Exhaust 041016

    FMF Powercore 4 Exhaust 041016

    FMF

    $279.99
    The FMF Powercore 4 delivers measurable power gains by optimizing exhaust gas flow through computer-designed geometry and dyno-tested tuning for your 4-stroke engine. A stainless steel mid-pipe paired with a lightweight elliptical aluminum can ensures...
    FMF041016
    SKU:
    FMF041016
    Availability:
    Ships Same Business Day
    Weight:
    2.85 LBS
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    FULL SYSTEM
    UNITS:
    KIT
    FEATURES:
    STANDARD
    BASE COLOR:
    SILVER
    DESIGN/CONFIGURATION:
    1-INTO-1 SYSTEM
    MATERIAL:
    STAINLESS STEEL
    MODEL:
    POWERCORE 4
    PRODUCT NAME:
    EXHAUST SYSTEM
    STYLE:
    ELLIPTICAL
    END CAP STYLE:
    EURO
    $279.99
    Qty in Cart: 0
    Quantity:
    Price:
    $279.99
    Subtotal:
  • FMF Powercore 4 Exhaust 041015

    FMF Powercore 4 Exhaust 041015

    FMF

    $299.99
    The FMF Powercore 4 Exhaust is engineered for 4-stroke engines that demand measurable gains in power and throttle response. Computer-designed and dyno-tested across a range of applications, this system delivers enhanced exhaust scavenging through...
    FMF041015
    SKU:
    FMF041015
    Availability:
    Ships Same Business Day
    Weight:
    0.01 LBS
    MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    ELLIPTICAL
    END CAP STYLE:
    EURO
    BASE COLOR:
    SILVER
    DESIGN/CONFIGURATION:
    1-INTO-1 SYSTEM
    MODEL:
    POWERCORE 4
    PRODUCT NAME:
    EXHAUST SYSTEM
    TYPE:
    FULL SYSTEM
    FEATURES:
    WITH SPARK ARRESTOR
    UNITS:
    KIT
    $299.99
    Qty in Cart: 0
    Quantity:
    Price:
    $299.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 041587

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 041587

    FMF

    $749.99
    If you're serious about extracting maximum performance from your machine, the FMF Factory 4.1 RCT muffler delivers measurable power gains across the entire RPM band without the weight penalty of traditional exhausts. The anodized titanium construction...
    18211978
    SKU:
    18211978
    Availability:
    Ships Same Business Day
    Weight:
    6.89 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    STRAIGHT CAN
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    MUFFLER MATERIAL:
    TITANIUM
    END CAP STYLE:
    CONICAL
    UNITS:
    EACH
    $749.99
    Qty in Cart: 0
    Quantity:
    Price:
    $749.99
    Subtotal:
  • FMF Powercore 4 Muffler 041584

    FMF Powercore 4 Muffler 041584

    FMF

    $359.99
    If you're looking to unlock measurable gains across your entire power band without compromising durability or reliability, the FMF Powercore 4 Muffler delivers real performance where it counts. The combination of lightweight aluminum construction and...
    18211966
    SKU:
    18211966
    Availability:
    Ships Same Business Day
    Weight:
    2.45 LBS
    END CAP MATERIAL:
    STAINLESS STEEL
    END CAP STYLE:
    CONICAL
    MODEL:
    POWERCORE 4
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    BASE COLOR:
    SILVER
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    $359.99
    Qty in Cart: 0
    Quantity:
    Price:
    $359.99
    Subtotal:
  • FMF Mini PowerCore 4 Slip-On Muffler - with Spark Arrestor 041582

    FMF Mini PowerCore 4 Slip-On Muffler - with Spark Arrestor 041582

    FMF

    $239.99
    If you're running a small-displacement or mini bike engine and want genuine performance gains without breaking your budget, the FMF Mini PowerCore 4 delivers measurable improvements in throttle response and power delivery. This slip-on muffler combines...
    18211965
    SKU:
    18211965
    Availability:
    Ships Same Business Day
    Weight:
    2.40 LBS
    FEATURES:
    WITH SPARK ARRESTOR
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MODEL:
    MINI POWERCORE 4
    PRODUCT NAME:
    MUFFLER
    $239.99
    Qty in Cart: 0
    Quantity:
    Price:
    $239.99
    Subtotal:
  • FMF Mini PowerCore 4 Slip-On Muffler - without Spark Arrestor - CRF125F '19+ 041581

    FMF Mini PowerCore 4 Slip-On Muffler - without Spark Arrestor - CRF125F '19+ 041581

    FMF

    $209.99
    The stock muffler on your CRF125F is costing you power and adding unnecessary weight. This FMF Mini PowerCore 4 slip-on delivers a measurable boost in throttle response and acceleration while trimming pounds from your machine—noticeable improvements that...
    18211964
    SKU:
    18211964
    Availability:
    Ships Same Business Day
    Weight:
    1.80 LBS
    FEATURES:
    WITHOUT SPARK ARRESTOR
    MODEL:
    MINI POWERCORE 4
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    $209.99
    Qty in Cart: 0
    Quantity:
    Price:
    $209.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 044429

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 044429

    FMF

    $799.99
    If you're serious about extracting maximum performance from your machine while reducing unsprung weight, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM band. The advanced Resonance Chamber Technology internally and externally...
    18211612
    SKU:
    18211612
    Availability:
    Ships Same Business Day
    Weight:
    6.40 LBS
    PRODUCT NAME:
    MUFFLER
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    CARBON FIBER
    MUFFLER MATERIAL:
    TITANIUM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    UNITS:
    EACH
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    PIPE MATERIAL:
    TITANIUM
    RIDING STYLE:
    OFF-ROAD
    $799.99
    Qty in Cart: 0
    Quantity:
    Price:
    $799.99
    Subtotal:
  • FMF Q4 HEX Muffler 044426

    FMF Q4 HEX Muffler 044426

    FMF

    $449.99
    The FMF Q4 HEX Muffler delivers measurable power gains across the entire RPM range while reducing weight and noise—letting you feel the performance improvement rather than just hear it. Its sophisticated multi-stage chamber design and proprietary packing...
    18211609
    SKU:
    18211609
    Availability:
    Ships Same Business Day
    Weight:
    8.43 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    END CAP MATERIAL:
    STAINLESS STEEL
    WEIGHT IMPERIAL:
    6.1 LB
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    MODEL:
    Q4 HEX
    MUFFLER COLOR/FINISH:
    RAW
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    $449.99
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    Subtotal:
  • FMF PowerCore 4 HEX Muffler 044423

    FMF PowerCore 4 HEX Muffler 044423

    FMF

    $399.99
    If you're looking to unlock measurable gains in power and torque while maintaining durability on the track or trail, the FMF PowerCore 4 HEX Muffler delivers both performance and longevity. This bolt-on muffler replaces restrictive stock designs with...
    18211606
    SKU:
    18211606
    Availability:
    Ships Same Business Day
    Weight:
    8.12 LBS
    MODEL:
    POWERCORE 4 HEX
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    END CAP MATERIAL:
    STAINLESS STEEL
    UNITS:
    EACH
    MUFFLER COLOR/FINISH:
    RAW
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Powercore 4 HEX Muffler 045645

    FMF Powercore 4 HEX Muffler 045645

    FMF

    $399.99
    If you're looking to extract real gains from your engine without compromising durability, the FMF Powercore 4 HEX delivers measurable increases in power and torque through superior flow dynamics. The Hi-Flo core design and enhanced sonic evacuation work...
    18211998
    SKU:
    18211998
    Availability:
    Ships Same Business Day
    Weight:
    6.10 LBS
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    POWERCORE 4 HEX
    PIPE MATERIAL:
    STAINLESS STEEL
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    MUFFLER COLOR/FINISH:
    RAW
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 044453

    FMF Factory 4.1 RCT Muffler - Aluminum 044453

    FMF

    $649.99
    If you're looking to unlock measurable power gains across your entire RPM range without sacrificing reliability, the FMF Factory 4.1 RCT delivers. This muffler combines proven engineering with genuine weight savings, giving you a competitive edge whether...
    18211883
    SKU:
    18211883
    Availability:
    Ships Same Business Day
    Weight:
    7.80 LBS
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    PIPE MATERIAL:
    STAINLESS STEEL
    $649.99
    Qty in Cart: 0
    Quantity:
    Price:
    $649.99
    Subtotal:
  • FMF Powercore 2.1 Muffler - Titanium 025254

    FMF Powercore 2.1 Muffler - Titanium 025254

    FMF

    $449.99
    The FMF Powercore 2.1 Titanium muffler is engineered for 4-stroke machines that demand consistent power delivery across the entire RPM range without sacrificing durability. Its large-diameter canister design extends packing life while reducing...
    18211915
    SKU:
    18211915
    Availability:
    Ships Same Business Day
    Weight:
    4.14 LBS
    PIPE MATERIAL:
    TITANIUM
    UNITS:
    EACH
    END CAP MATERIAL:
    TITANIUM
    MODEL:
    POWERCORE 2.1
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    MUFFLER MATERIAL:
    TITANIUM
    PRODUCT NAME:
    SILENCER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    $449.99
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 045648

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 045648

    FMF

    $649.99
    If you're serious about extracting maximum power from your machine while cutting unnecessary weight, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM range. Its compact design centralizes mass closer to the motor—improving handling...
    18212001
    SKU:
    18212001
    Availability:
    Ships Same Business Day
    Weight:
    6.25 LBS
    PIPE MATERIAL:
    TITANIUM
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    MUFFLER MATERIAL:
    TITANIUM
    RIDING STYLE:
    OFF-ROAD
    PRODUCT NAME:
    MUFFLER
    $649.99
    Qty in Cart: 0
    Quantity:
    Price:
    $649.99
    Subtotal:
  • FMF Powercore 2.1 Shorty Muffler 025253

    FMF Powercore 2.1 Shorty Muffler 025253

    FMF

    $239.99
    If you're serious about maximizing your bike's performance while keeping weight minimal, the FMF Powercore 2.1 Shorty Muffler is the benchmark exhaust system others are still chasing. Its lightweight titanium construction combined with a...
    18211914
    SKU:
    18211914
    Availability:
    Ships Same Business Day
    Weight:
    2.85 LBS
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    SILENCER
    STYLE:
    SHORT
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    POWERCORE 2.1 SHORTY
    PIPE MATERIAL:
    STAINLESS STEEL
    TYPE:
    SLIP-ON
    $239.99
    Qty in Cart: 0
    Quantity:
    Price:
    $239.99
    Subtotal:
  • Total: items /

Adding your products to cart

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

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