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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 Muffler 043095

    FMF Powercore 4 Muffler 043095

    FMF

    $269.99
    Stock exhaust systems rob your Mini of both power and character. The FMF Powercore 4 delivers measurable horsepower gains and a more aggressive acoustic signature through a bolt-on design that requires no fabrication or tuning adjustments. If you're...
    18210521
    SKU:
    18210521
    Availability:
    Ships Same Business Day
    Weight:
    4.00 LBS
    END CAP STYLE:
    CONICAL
    UNITS:
    EACH
    PIPE MATERIAL:
    STAINLESS STEEL
    END CAP MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    WEIGHT IMPERIAL:
    2.6 LB
    MODEL:
    POWERCORE 4
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    $269.99
    Qty in Cart: 0
    Quantity:
    Price:
    $269.99
    Subtotal:
  • FMF Powercore 4 Muffler 041284

    FMF Powercore 4 Muffler 041284

    FMF

    $399.99
    If you're looking for measurable power gains without compromise, the FMF Powercore 4 Muffler delivers consistent horsepower and torque increases across the entire power curve—the kind of performance boost you'll actually feel on every ride. Built with...
    18210540
    SKU:
    18210540
    Availability:
    Ships Same Business Day
    Weight:
    5.90 LBS
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MODEL:
    POWERCORE 4
    MUFFLER MATERIAL:
    ALUMINUM
    STYLE:
    OVAL
    END CAP STYLE:
    CONICAL
    UNITS:
    EACH
    BASE COLOR:
    SILVER
    END CAP MATERIAL:
    STAINLESS STEEL
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Q4 Muffler 041287 FMF Q4 Muffler 041287

    FMF Q4 Muffler 041287

    FMF

    $449.99
    If you're running off-road, you need a muffler that doesn't force you to choose between noise compliance and power delivery. The FMF Q4 combines championship-proven engineering with a lightweight design that actually improves your power-to-weight ratio—a...
    18210543
    SKU:
    18210543
    Availability:
    Ships Same Business Day
    Weight:
    6.35 LBS
    MUFFLER COLOR/FINISH:
    RAW
    PIPE MATERIAL:
    STAINLESS STEEL
    BASE COLOR:
    SILVER
    END CAP MATERIAL:
    STAINLESS STEEL
    END CAP STYLE:
    CONICAL
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    MODEL:
    Q4
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    Subtotal:
  • FMF Powercore 4 Muffler 044228

    FMF Powercore 4 Muffler 044228

    FMF

    $399.99
    The FMF Powercore 4 Muffler delivers measurable gains across your entire power curve without sacrificing rideability or reliability. Built for riders who demand real-world performance improvements—not just noise—this muffler balances power output with...
    18210578
    SKU:
    18210578
    Availability:
    Ships Same Business Day
    Weight:
    6.60 LBS
    BASE COLOR:
    SILVER
    END CAP STYLE:
    CONICAL
    UNITS:
    EACH
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    END CAP MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    MODEL:
    POWERCORE 4
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Q4 Muffler 044232 FMF Q4 Muffler 044232

    FMF Q4 Muffler 044232

    FMF

    $449.99
    If you're running off-road and need to meet sound regulations without sacrificing performance, the FMF Q4 Muffler delivers race-proven quiet power that doesn't compromise your engine's potential. Engineered through years of championship off-road racing,...
    18210581
    SKU:
    18210581
    Availability:
    Ships Same Business Day
    Weight:
    7.60 LBS
    BASE COLOR:
    SILVER
    END CAP STYLE:
    CONICAL
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    END CAP MATERIAL:
    STAINLESS STEEL
    MUFFLER COLOR/FINISH:
    RAW
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    MODEL:
    Q4
    MUFFLER MATERIAL:
    ALUMINUM
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    $449.99
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    Subtotal:
  • FMF Powercore 4 Muffler 041273

    FMF Powercore 4 Muffler 041273

    FMF

    $399.99
    If you're looking to unlock measurable performance gains without compromising reliability, the FMF Powercore 4 Muffler delivers consistent horsepower and torque increases across your entire power curve. Built with a proven aluminum core and stainless...
    18210662
    SKU:
    18210662
    Availability:
    Ships Same Business Day
    Weight:
    6.56 LBS
    BASE COLOR:
    SILVER
    MODEL:
    POWERCORE 4
    END CAP STYLE:
    CONICAL
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    END CAP MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Powercore 4 Muffler 041274

    FMF Powercore 4 Muffler 041274

    FMF

    $399.99
    The FMF Powercore 4 Muffler delivers measurable gains across your entire power curve—horsepower and torque improvements that translate to real-world performance whether you're on the track or trail. Built with lightweight aluminum and stainless steel...
    18210663
    SKU:
    18210663
    Availability:
    Ships Same Business Day
    Weight:
    6.38 LBS
    END CAP MATERIAL:
    STAINLESS STEEL
    END CAP STYLE:
    CONICAL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    MUFFLER MATERIAL:
    ALUMINUM
    STYLE:
    OVAL
    BASE COLOR:
    SILVER
    MODEL:
    POWERCORE 4
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Powercore 4 Muffler 042123

    FMF Powercore 4 Muffler 042123

    FMF

    $399.99
    The FMF Powercore 4 Muffler delivers measurable horsepower and torque gains across the entire power band, giving you usable performance whether you're trail riding, sport touring, or pushing hard on the track. Its lightweight aluminum construction paired...
    18210672
    SKU:
    18210672
    Availability:
    Ships Same Business Day
    Weight:
    6.19 LBS
    MUFFLER MATERIAL:
    ALUMINUM
    STYLE:
    OVAL
    END CAP MATERIAL:
    STAINLESS STEEL
    END CAP STYLE:
    CONICAL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    BASE COLOR:
    SILVER
    MODEL:
    POWERCORE 4
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Q4 Muffler 044195 FMF Q4 Muffler 044195

    FMF Q4 Muffler 044195

    FMF

    $449.99
    If you're running serious off-road miles, you know that a poorly designed muffler will either choke your engine's potential or destroy your hearing—sometimes both. The FMF Q4 delivers championship-level sound suppression without sacrificing the power...
    18210676
    SKU:
    18210676
    Availability:
    Ships Same Business Day
    Weight:
    7.44 LBS
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    BASE COLOR:
    SILVER
    END CAP STYLE:
    CONICAL
    END CAP MATERIAL:
    STAINLESS STEEL
    MUFFLER COLOR/FINISH:
    RAW
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    MODEL:
    Q4
    MUFFLER MATERIAL:
    ALUMINUM
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    $449.99
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    Subtotal:
  • FMF Powercore 4 Muffler 044220

    FMF Powercore 4 Muffler 044220

    FMF

    $399.99
    The FMF Powercore 4 Muffler delivers measurable horsepower and torque gains across your entire power curve without sacrificing durability or ride-ability. Whether you're hammering a track or cruising trails, this exhaust upgrade provides usable...
    18210680
    SKU:
    18210680
    Availability:
    Ships Same Business Day
    Weight:
    6.44 LBS
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MODEL:
    POWERCORE 4
    MUFFLER MATERIAL:
    ALUMINUM
    STYLE:
    OVAL
    END CAP STYLE:
    CONICAL
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    UNITS:
    EACH
    BASE COLOR:
    SILVER
    END CAP MATERIAL:
    STAINLESS STEEL
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Powercore 4 Muffler 044222

    FMF Powercore 4 Muffler 044222

    FMF

    $399.99
    If you're looking to unlock measurable power gains across your entire power band without compromising durability, the FMF Powercore 4 Muffler delivers real performance where it counts. The intelligent chambering design produces usable torque and...
    18210681
    SKU:
    18210681
    Availability:
    Ships Same Business Day
    Weight:
    6.56 LBS
    END CAP MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MODEL:
    POWERCORE 4
    MUFFLER MATERIAL:
    ALUMINUM
    STYLE:
    OVAL
    BASE COLOR:
    SILVER
    END CAP STYLE:
    CONICAL
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    UNITS:
    EACH
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Powercore 4 Muffler 042160

    FMF Powercore 4 Muffler 042160

    FMF

    $269.99
    If you're running a Mini and want measurable gains in exhaust flow without the fabrication hassle, the FMF Powercore 4 delivers. This bolt-on muffler reduces backpressure while cutting weight, giving you better throttle response and a noticeable...
    18210807
    SKU:
    18210807
    Availability:
    Ships Same Business Day
    Weight:
    5.25 LBS
    END CAP STYLE:
    CONICAL
    RIDING STYLE:
    OFF-ROAD
    BASE COLOR:
    SILVER
    WEIGHT IMPERIAL:
    2.5 LB
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    POWERCORE 4
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    MUFFLER MATERIAL:
    ALUMINUM
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    $269.99
    Qty in Cart: 0
    Quantity:
    Price:
    $269.99
    Subtotal:
  • FMF Powercore 4 Muffler 042161

    FMF Powercore 4 Muffler 042161

    FMF

    $289.99
    The FMF Powercore 4 Muffler delivers measurable performance gains without breaking your budget—a genuine bolt-on upgrade that reduces exhaust restriction while shedding unnecessary weight. If you're looking to improve throttle response and free up...
    18210808
    SKU:
    18210808
    Availability:
    Ships Same Business Day
    Weight:
    5.20 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    BASE COLOR:
    SILVER
    MODEL:
    POWERCORE 4
    UNITS:
    EACH
    WEIGHT IMPERIAL:
    2.9 LB
    END CAP STYLE:
    CONICAL
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    END CAP MATERIAL:
    STAINLESS STEEL
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    $289.99
    Qty in Cart: 0
    Quantity:
    Price:
    $289.99
    Subtotal:
  • FMF Q4 HEX Muffler 041578

    FMF Q4 HEX Muffler 041578

    FMF

    $449.99
    The FMF Q4 HEX Muffler delivers measurable power gains across your entire RPM range while cutting weight and keeping sound levels low enough to maintain ground clearance on technical terrain. Its multi-stage chamber design and proprietary packing...
    18211952
    SKU:
    18211952
    Availability:
    Ships Same Business Day
    Weight:
    7.50 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    UNITS:
    EACH
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    Q4 HEX
    $449.99
    Qty in Cart: 0
    Quantity:
    Price:
    $449.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 042374

    FMF Factory 4.1 RCT Muffler - Aluminum 042374

    FMF

    $599.99
    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 without compromise. By centralizing mass closer to the motor through...
    18211953
    SKU:
    18211953
    Availability:
    Ships Same Business Day
    Weight:
    3.00 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
    $599.99
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 042376

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 042376

    FMF

    $749.99
    If you're serious about maximizing your bike's performance while reducing unsprung weight, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM range without compromise. The shorter profile and centralized mass design improve handling...
    18211955
    SKU:
    18211955
    Availability:
    Ships Same Business Day
    Weight:
    6.70 LBS
    PIPE MATERIAL:
    TITANIUM
    UNITS:
    EACH
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    MUFFLER MATERIAL:
    TITANIUM
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    $749.99
    Qty in Cart: 0
    Quantity:
    Price:
    $749.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 043372

    FMF Factory 4.1 RCT Muffler - Aluminum 043372

    FMF

    $599.99
    If you're running a high-performance engine, your exhaust system is either unlocking or limiting your potential. The FMF Factory 4.1 RCT Muffler delivers measurable power gains across the entire RPM range while shedding unnecessary weight—critical...
    18211958
    SKU:
    18211958
    Availability:
    Ships Same Business Day
    Weight:
    4.70 LBS
    MUFFLER MATERIAL:
    ALUMINUM
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    RAW
    END CAP MATERIAL:
    CARBON FIBER
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 043373

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 043373

    FMF

    $749.99
    If you're serious about maximizing power across your entire RPM band while cutting unnecessary weight, the FMF Factory 4.1 RCT delivers measurable gains without compromise. Its Resonance Chamber Technology™ design—engineered both internally and...
    18211959
    SKU:
    18211959
    Availability:
    Ships Same Business Day
    Weight:
    7.00 LBS
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    CARBON FIBER
    MUFFLER MATERIAL:
    TITANIUM
    UNITS:
    EACH
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    PIPE MATERIAL:
    TITANIUM
    $749.99
    Qty in Cart: 0
    Quantity:
    Price:
    $749.99
    Subtotal:
  • FMF Mini PowerCore 4 Slip-On Muffler - without Spark Arrestor - CRF110F '19+ 041579

    FMF Mini PowerCore 4 Slip-On Muffler - without Spark Arrestor - CRF110F '19+ 041579

    FMF

    $209.99
    The FMF Mini PowerCore 4 delivers noticeable performance gains on your CRF110F with a lightweight slip-on design that transforms throttle response immediately. This stainless steel and aircraft-grade aluminum construction sheds unnecessary weight while...
    18211962
    SKU:
    18211962
    Availability:
    Ships Same Business Day
    Weight:
    1.95 LBS
    MODEL:
    MINI POWERCORE 4
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    FEATURES:
    WITHOUT SPARK ARRESTOR
    $209.99
    Qty in Cart: 0
    Quantity:
    Price:
    $209.99
    Subtotal:
  • FMF Mini PowerCore 4 Slip-On Muffler - with Spark Arrestor 041580

    FMF Mini PowerCore 4 Slip-On Muffler - with Spark Arrestor 041580

    FMF

    $239.99
    If you're running a small-displacement engine and want immediate throttle response without the weight penalty of a stock muffler, the FMF Mini PowerCore 4 delivers measurable horsepower gains and a noticeably lighter footprint. The stainless steel core...
    18211963
    SKU:
    18211963
    Availability:
    Ships Same Business Day
    Weight:
    2.55 LBS
    FEATURES:
    WITH SPARK ARRESTOR
    MODEL:
    MINI POWERCORE 4
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    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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