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Dirt Bike 4-Stroke Mufflers

Dirt Bike 4-Stroke Mufflers

Upgrade to 4-stroke mufflers engineered for maximum efficiency and sound control. These high-performance components enhance power delivery while delivering a smoother, quieter ride. Perfect for competitive racing or casual trail rides, our dirt bike 4-stroke mufflers ensure top-tier performance with lasting durability.

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • FMF Powercore 4 Muffler 042122

    FMF Powercore 4 Muffler 042122

    FMF

    $399.99
    Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding, Aluminum construction and stainless steel Hi-Flo end caps make for the...
    18210671
    SKU:
    18210671
    Availability:
    Ships Same Business Day
    Weight:
    6.55 LBS
    MODEL:
    POWERCORE 4
    MUFFLER MATERIAL:
    ALUMINUM
    STYLE:
    OVAL
    PRODUCT NAME:
    MUFFLER
    TYPE:
    SLIP-ON
    BASE COLOR:
    SILVER
    END CAP MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    END CAP STYLE:
    CONICAL
    UNITS:
    EACH
    $399.99
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Powercore 4 Muffler 045135

    FMF Powercore 4 Muffler 045135

    FMF

    $399.99
    Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding, Aluminum construction and stainless steel Hi-Flo end caps make for the...
    18210689
    SKU:
    18210689
    Availability:
    Ships Same Business Day
    Weight:
    5.87 LBS
    MODEL:
    POWERCORE 4
    MUFFLER MATERIAL:
    ALUMINUM
    STYLE:
    OVAL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    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 Q4 Muffler 041332

    FMF Q4 Muffler 041332

    FMF

    $379.99
    The Q series features advanced engineering to precisely locate baffles and chambers to absorb sound, Less mass to enhance power-to-weight ratio, Quiet power with minimal sacrifice for performance, Developed over years of championship off-road racing,...
    18210887
    SKU:
    18210887
    Availability:
    Ships Same Business Day
    Weight:
    5.30 LBS
    BASE COLOR:
    SILVER
    END CAP MATERIAL:
    STAINLESS STEEL
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    END CAP STYLE:
    CONICAL
    MODEL:
    Q4
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    MUFFLER COLOR/FINISH:
    RAW
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    Qty in Cart: 0
    Quantity:
    Price:
    $379.99
    Subtotal:
  • FMF PowerCore 4 HEX Muffler 043370

    FMF PowerCore 4 HEX Muffler 043370

    FMF

    $399.99
    Overall increase in power and torque, Durable stainless steel and aluminum construction, Space Age internal packing material for maximum longevity, Internal shape of core uses Hi-Flo technology, Enhanced sonic evacuation provides for higher flow and...
    18211956
    SKU:
    18211956
    Availability:
    Ships Same Business Day
    Weight:
    6.60 LBS
    END CAP MATERIAL:
    STAINLESS STEEL
    UNITS:
    EACH
    MODEL:
    POWERCORE 4 HEX
    MUFFLER COLOR/FINISH:
    RAW
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Powercore 4 Muffler 041048

    FMF Powercore 4 Muffler 041048

    FMF

    $359.99
    Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding, Aluminum construction and stainless steel Hi-Flo end caps make for the...
    FMF041048
    SKU:
    FMF041048
    Availability:
    Ships Same Business Day
    Weight:
    6.00 LBS
    END CAP STYLE:
    CONICAL
    UNITS:
    EACH
    BASE COLOR:
    SILVER
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    POWERCORE 4
    MUFFLER MATERIAL:
    ALUMINUM
    STYLE:
    OVAL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    Qty in Cart: 0
    Quantity:
    Price:
    $359.99
    Subtotal:
  • FMF Powercore 4 Muffler 041036

    FMF Powercore 4 Muffler 041036

    FMF

    $399.99
    Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding, Aluminum construction and stainless steel Hi-Flo end caps make for the...
    FMF041036
    SKU:
    FMF041036
    Availability:
    Ships Same Business Day
    Weight:
    6.45 LBS
    END CAP STYLE:
    CONICAL
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    STYLE:
    MODULAR
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    BASE COLOR:
    SILVER
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    POWERCORE 4
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Powercore 4 Muffler 041023

    FMF Powercore 4 Muffler 041023

    FMF

    $399.99
    Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding, Aluminum construction and stainless steel Hi-Flo end caps make for the...
    FMF041023
    SKU:
    FMF041023
    Availability:
    Ships Same Business Day
    Weight:
    6.16 LBS
    RIDING STYLE:
    OFF-ROAD
    STYLE:
    OVAL
    TYPE:
    SLIP-ON
    MODEL:
    POWERCORE 4
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    BASE COLOR:
    SILVER
    END CAP MATERIAL:
    STAINLESS STEEL
    END CAP STYLE:
    CONICAL
    STYLE:
    MODULAR
    UNITS:
    EACH
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Powercore 4 Muffler 041021

    FMF Powercore 4 Muffler 041021

    FMF

    $399.99
    Developed to increase the horsepower and torque throughout the entire power curve producing a noticeable power increase that is usable and compatible with every style of riding, Aluminum construction and stainless steel Hi-Flo end caps make for the...
    FMF041021
    SKU:
    FMF041021
    Availability:
    Ships Same Business Day
    Weight:
    6.46 LBS
    BASE COLOR:
    SILVER
    END CAP STYLE:
    CONICAL
    STYLE:
    MODULAR
    UNITS:
    EACH
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    STAINLESS STEEL
    MODEL:
    POWERCORE 4
    MUFFLER MATERIAL:
    ALUMINUM
    STYLE:
    OVAL
    Qty in Cart: 0
    Quantity:
    Price:
    $399.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 044427

    FMF Factory 4.1 RCT Muffler - Aluminum 044427

    FMF

    $674.99
    The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technologyâ„¢ both internally and externally, In addition, FMF achieves a shorter overall length that is less susceptible to crash damage and complementary to their Factory Forward Engineering -...
    18211610
    SKU:
    18211610
    Availability:
    Ships Same Business Day
    Weight:
    8.10 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:
    CARBON FIBER
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    UNITS:
    EACH
    MODEL:
    FACTORY 4.1 RCT
    Qty in Cart: 0
    Quantity:
    Price:
    $674.99
    Subtotal:
  • On Sale
    Pro Circuit T-5 Slip-On Exhaust for Kawasaki KLR650 2008-2015 0121365A

    Pro Circuit T-5 Slip-On Exhaust for Kawasaki KLR650 2008-2015 0121365A

    PRO CIRCUIT

    MSRP: $590.95
    Now: $520.04
    Was: $590.95
    Pro Circuit T-5 Slip-On Muffler - Part # 0121365A Transform your riding experience with the Pro Circuit T-5 Slip-On Muffler, crafted for those who demand both performance and reliability. This muffler is engineered for off-road enthusiasts and...
    18211532
    SKU:
    18211532
    Availability:
    Ships Same Business Day
    Weight:
    13.05 LBS
    FEATURES:
    WITH SPARK ARRESTOR
    PIPE MATERIAL:
    STAINLESS STEEL
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    STAINLESS STEEL
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    SILENCER
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    UNITS:
    EACH
    MODEL:
    T-5
    MSRP: $590.95
    Now: $520.04
    Was: $590.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $590.95
    Now: $520.04
    Was: $590.95
    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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