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FMF Dirt Bike 4 Stroke Mufflers

FMF Dirt Bike 4 Stroke Mufflers

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • FMF PowerCore 4 HEX Muffler 041586

    FMF PowerCore 4 HEX Muffler 041586

    FMF

    $399.99
    The FMF PowerCore 4 HEX delivers measurable gains in power and torque while maintaining the durability you need for repeated heat cycles and aggressive riding conditions. Its Hi-Flo internal core geometry reduces backpressure, allowing your engine to...
    18113799
    SKU:
    18113799
    Availability:
    Ships Same Business Day
    Weight:
    3.10 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    END CAP MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    MODEL:
    POWERCORE 4 HEX
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 043364

    FMF Factory 4.1 RCT Muffler - Aluminum 043364

    FMF

    $599.99
    If you're serious about extracting maximum horsepower while reducing unsprung weight, the FMF Factory 4.1 RCT represents a measurable upgrade over stock. The dual Resonance Chamber Technologyâ„¢ design delivers consistent power gains across the entire RPM...
    18211857
    SKU:
    18211857
    Availability:
    Ships Same Business Day
    Weight:
    7.20 LBS
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MODEL:
    FACTORY 4.1 RCT
    END CAP MATERIAL:
    CARBON FIBER
    UNITS:
    EACH
    $599.99
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
    Subtotal:
  • FMF PowerCore 4 HEX Muffler 044451

    FMF PowerCore 4 HEX Muffler 044451

    FMF

    $399.99
    The FMF PowerCore 4 HEX Muffler delivers measurable gains in power and torque while maintaining the durability you need for sustained high-performance operation. Its advanced internal geometry maximizes exhaust flow without sacrificing longevity, making...
    18211881
    SKU:
    18211881
    Availability:
    Ships Same Business Day
    Weight:
    7.20 LBS
    UNITS:
    EACH
    MUFFLER COLOR/FINISH:
    RAW
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    POWERCORE 4 HEX
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 044455

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 044455

    FMF

    $849.99
    If you're serious about extracting maximum power from your machine while cutting unnecessary weight, the FMF Factory 4.1 RCT is the exhaust system that delivers across the entire RPM range. Built from aerospace-grade titanium and engineered in-house at...
    18211885
    SKU:
    18211885
    Availability:
    Ships Same Business Day
    Weight:
    7.90 LBS
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MUFFLER MATERIAL:
    TITANIUM
    END CAP MATERIAL:
    CARBON FIBER
    UNITS:
    EACH
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    PIPE MATERIAL:
    TITANIUM
    $849.99
    Qty in Cart: 0
    Quantity:
    Price:
    $849.99
    Subtotal:
  • FMF PowerCore 4 HEX Muffler 042367

    FMF PowerCore 4 HEX Muffler 042367

    FMF

    $399.99
    If you're running a stock muffler, you're leaving power on the table. The FMF PowerCore 4 HEX delivers measurable gains in both power and torque through optimized internal flow dynamics, while the durable stainless steel and aluminum construction ensures...
    18211886
    SKU:
    18211886
    Availability:
    Ships Same Business Day
    Weight:
    7.00 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    POWERCORE 4 HEX
    UNITS:
    EACH
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Q4 HEX Muffler 042368

    FMF Q4 HEX Muffler 042368

    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—meaning you'll accelerate faster and climb better without sacrificing durability. Its advanced multi-chamber...
    18211887
    SKU:
    18211887
    Availability:
    Ships Same Business Day
    Weight:
    7.20 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    END CAP MATERIAL:
    STAINLESS STEEL
    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 Factory 4.1 RCT Muffler - Aluminum 042369

    FMF Factory 4.1 RCT Muffler - Aluminum 042369

    FMF

    $599.99
    If you're serious about extracting maximum power from your machine while reducing unsprung weight, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM band without compromise. The Resonance Chamber Technologyâ„¢ design eliminates the...
    18211888
    SKU:
    18211888
    Availability:
    Ships Same Business Day
    Weight:
    7.64 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MUFFLER MATERIAL:
    ALUMINUM
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    RAW
    END CAP MATERIAL:
    CARBON FIBER
    UNITS:
    EACH
    $599.99
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 042371

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 042371

    FMF

    $749.99
    If you're serious about maximizing power and minimizing weight, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM range without compromise. Built from aerospace-grade titanium and engineered at FMF's Southern California facility,...
    18211890
    SKU:
    18211890
    Availability:
    Ships Same Business Day
    Weight:
    7.13 LBS
    PIPE MATERIAL:
    TITANIUM
    UNITS:
    EACH
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    MUFFLER MATERIAL:
    TITANIUM
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    PRODUCT NAME:
    MUFFLER
    $749.99
    Qty in Cart: 0
    Quantity:
    Price:
    $749.99
    Subtotal:
  • FMF PowerCore 4 HEX Muffler 045626

    FMF PowerCore 4 HEX Muffler 045626

    FMF

    $549.99
    The FMF PowerCore 4 HEX delivers measurable gains in horsepower and torque while maintaining the durability required for serious riding. Its lightweight stainless steel and aluminum construction resists corrosion and thermal stress, ensuring consistent...
    18211918
    SKU:
    18211918
    Availability:
    Ships Same Business Day
    Weight:
    7.20 LBS
    MODEL:
    POWERCORE 4 HEX
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    STAINLESS STEEL
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    UNITS:
    EACH
    $549.99
    Qty in Cart: 0
    Quantity:
    Price:
    $549.99
    Subtotal:
  • FMF Q4 HEX Muffler 045627

    FMF Q4 HEX Muffler 045627

    FMF

    $569.99
    The FMF Q4 HEX Muffler delivers measurable power gains across the entire RPM range while reducing weight and sound signature—critical for off-road racers and performance enthusiasts who need their machine to work harder, not louder. Its sophisticated...
    18211919
    SKU:
    18211919
    Availability:
    Ships Same Business Day
    Weight:
    7.30 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    STAINLESS STEEL
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    UNITS:
    EACH
    MODEL:
    Q4 HEX
    $569.99
    Qty in Cart: 0
    Quantity:
    Price:
    $569.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 045628

    FMF Factory 4.1 RCT Muffler - Aluminum 045628

    FMF

    $674.99
    If you're running a serious two-stroke machine, exhaust flow directly impacts your power curve—and most stock mufflers leave significant performance on the table. The FMF Factory 4.1 RCT delivers measurable horsepower gains across the entire RPM band...
    18211920
    SKU:
    18211920
    Availability:
    Ships Same Business Day
    Weight:
    3.40 LBS
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    PIPE MATERIAL:
    STAINLESS STEEL
    TYPE:
    SLIP-ON
    PRODUCT NAME:
    MUFFLER
    $674.99
    Qty in Cart: 0
    Quantity:
    Price:
    $674.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 045629

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 045629

    FMF

    $854.99
    If you're serious about maximizing power delivery across the entire RPM band while shedding unnecessary weight, the FMF Factory 4.1 RCT is engineered to deliver measurable gains without compromise. Its compact design centralizes mass and resists crash...
    18211921
    SKU:
    18211921
    Availability:
    Ships Same Business Day
    Weight:
    7.10 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:
    ANODIZED BLUE
    MUFFLER MATERIAL:
    TITANIUM
    PIPE MATERIAL:
    TITANIUM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    $854.99
    Qty in Cart: 0
    Quantity:
    Price:
    $854.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 045633

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 045633

    FMF

    $854.99
    If you're serious about maximizing power across your entire RPM range while cutting unnecessary weight, the FMF Factory 4.1 RCT delivers measurable gains without compromise. Built from aerospace-grade titanium and engineered entirely in Southern...
    18211925
    SKU:
    18211925
    Availability:
    Ships Same Business Day
    Weight:
    6.60 LBS
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    PIPE MATERIAL:
    TITANIUM
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    CARBON FIBER
    MUFFLER MATERIAL:
    TITANIUM
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    $854.99
    Qty in Cart: 0
    Quantity:
    Price:
    $854.99
    Subtotal:
  • FMF PowerCore 4 HEX Muffler 042345

    FMF PowerCore 4 HEX Muffler 042345

    FMF

    $399.99
    If you're looking to extract real performance gains without sacrificing durability, the FMF PowerCore 4 HEX delivers measurable increases in power and torque through optimized exhaust flow. The stainless steel and aluminum construction is built to...
    18211794
    SKU:
    18211794
    Availability:
    Ships Same Business Day
    Weight:
    6.90 LBS
    MODEL:
    POWERCORE 4 HEX
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    STAINLESS STEEL
    MUFFLER COLOR/FINISH:
    RAW
    RIDING STYLE:
    OFF-ROAD
    MUFFLER MATERIAL:
    ALUMINUM
    UNITS:
    EACH
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF PowerCore 4 HEX Muffler 044441

    FMF PowerCore 4 HEX Muffler 044441

    FMF

    $399.99
    If you're looking to unlock measurable gains in power and torque without sacrificing reliability, the FMF PowerCore 4 HEX delivers the flow characteristics serious riders demand. Built with premium stainless steel and aluminum construction, this muffler...
    18211836
    SKU:
    18211836
    Availability:
    Ships Same Business Day
    Weight:
    6.65 LBS
    UNITS:
    EACH
    MUFFLER COLOR/FINISH:
    RAW
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    POWERCORE 4 HEX
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Q4 HEX Muffler 044442

    FMF Q4 HEX Muffler 044442

    FMF

    $449.99
    The FMF Q4 HEX Muffler delivers measurable power gains across the entire RPM range while significantly reducing weight—meaning you get real performance improvement without sacrificing durability. Its multi-stage chambered design and proprietary packing...
    18211837
    SKU:
    18211837
    Availability:
    Ships Same Business Day
    Weight:
    7.20 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    Q4 HEX
    MUFFLER COLOR/FINISH:
    RAW
    RIDING STYLE:
    OFF-ROAD
    MUFFLER MATERIAL:
    ALUMINUM
    UNITS:
    EACH
    $449.99
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 044443

    FMF Factory 4.1 RCT Muffler - Aluminum 044443

    FMF

    $649.99
    If you're serious about maximizing exhaust flow and reducing unsprung weight, the FMF Factory 4.1 RCT delivers measurable power gains across the entire RPM band without compromising durability. The compact design and centralized mass positioning work in...
    18211838
    SKU:
    18211838
    Availability:
    Ships Same Business Day
    Weight:
    9.15 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    END CAP MATERIAL:
    CARBON FIBER
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    RAW
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    $649.99
    Qty in Cart: 0
    Quantity:
    Price:
    $649.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 044445

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 044445

    FMF

    $849.99
    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 without compromise. Built from aerospace-grade titanium and engineered...
    18211840
    SKU:
    18211840
    Availability:
    Ships Same Business Day
    Weight:
    8.35 LBS
    PIPE MATERIAL:
    TITANIUM
    UNITS:
    EACH
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    CARBON FIBER
    MUFFLER MATERIAL:
    TITANIUM
    PRODUCT NAME:
    MUFFLER
    $849.99
    Qty in Cart: 0
    Quantity:
    Price:
    $849.99
    Subtotal:
  • FMF PowerCore 4 HEX Muffler 045589

    FMF PowerCore 4 HEX Muffler 045589

    FMF

    $399.99
    The FMF PowerCore 4 HEX delivers measurable gains in power and torque by optimizing exhaust flow through advanced internal geometry and durable construction. If you're serious about performance, this muffler replaces restrictive OEM units with a tuned...
    18211716
    SKU:
    18211716
    Availability:
    Ships Same Business Day
    Weight:
    6.67 LBS
    END CAP MATERIAL:
    STAINLESS STEEL
    MUFFLER MATERIAL:
    ALUMINUM
    MODEL:
    POWERCORE 4 HEX
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    UNITS:
    EACH
    MUFFLER COLOR/FINISH:
    RAW
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Q4 HEX Muffler 045590

    FMF Q4 HEX Muffler 045590

    FMF

    $449.99
    The FMF Q4 HEX Muffler delivers measurable power gains across your entire RPM range while significantly reducing system weight—letting you feel the performance improvement without unnecessary noise. Its advanced multi-chamber design with proprietary...
    18211717
    SKU:
    18211717
    Availability:
    Ships Same Business Day
    Weight:
    6.71 LBS
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    WEIGHT IMPERIAL:
    5.1 LB
    MODEL:
    Q4 HEX
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    END CAP MATERIAL:
    STAINLESS STEEL
    $449.99
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    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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