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FMF Factory 4.1 Mufflers

FMF Factory 4.1 Mufflers

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • FMF Factory 4.1 RCT Muffler - Aluminum 042290

    FMF Factory 4.1 RCT Muffler - Aluminum 042290

    FMF

    $599.99
    If you're serious about extracting maximum power while reducing unsprung weight, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM band without compromise. The Resonance Chamber Technologyâ„¢ and optimized mass centralization give you...
    18211391
    SKU:
    18211391
    Availability:
    Ships Same Business Day
    Weight:
    8.83 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
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 042291

    FMF Factory 4.1 RCT Muffler - Aluminum 042291

    FMF

    $599.99
    If you're serious about extracting maximum power from your engine while reducing weight and minimizing crash vulnerability, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM range. By centralizing mass through Factory Forward...
    18211392
    SKU:
    18211392
    Availability:
    Ships Same Business Day
    Weight:
    8.72 LBS
    PIPE MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    RAW
    MUFFLER MATERIAL:
    ALUMINUM
    END CAP MATERIAL:
    CARBON FIBER
    UNITS:
    EACH
    $599.99
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 042292

    FMF Factory 4.1 RCT Muffler - Aluminum 042292

    FMF

    $599.99
    If you're serious about extracting maximum performance from your bike while reducing weight and minimizing crash damage risk, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM range. FMF's Resonance Chamber Technologyâ„¢ optimizes...
    18211393
    SKU:
    18211393
    Availability:
    Ships Same Business Day
    Weight:
    8.74 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
    UNITS:
    EACH
    MODEL:
    FACTORY 4.1 RCT
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 044464

    FMF Factory 4.1 RCT Muffler - Aluminum 044464

    FMF

    $674.99
    If you're serious about extracting maximum power from your engine while reducing unsprung weight, the FMF Factory 4.1 RCT Muffler delivers measurable gains across the entire RPM range without compromise. By centralizing mass closer to the motor through...
    18212012
    SKU:
    18212012
    Availability:
    Ships Same Business Day
    Weight:
    8.40 LBS
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    RAW
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    PRODUCT NAME:
    MUFFLER
    MUFFLER MATERIAL:
    ALUMINUM
    PIPE MATERIAL:
    STAINLESS STEEL
    $674.99
    Qty in Cart: 0
    Quantity:
    Price:
    $674.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 044466

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 044466

    FMF

    $799.99
    If you're serious about extracting maximum power from your machine while minimizing unsprung weight, the FMF Factory 4.1 RCT is engineered to deliver across the entire RPM band. Its shorter, centralized design reduces crash vulnerability and lowers your...
    18212013
    SKU:
    18212013
    Availability:
    Ships Same Business Day
    Weight:
    8.40 LBS
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    PIPE MATERIAL:
    TITANIUM
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    MUFFLER MATERIAL:
    TITANIUM
    RIDING STYLE:
    OFF-ROAD
    PRODUCT NAME:
    MUFFLER
    $799.99
    Qty in Cart: 0
    Quantity:
    Price:
    $799.99
    Subtotal:
  • FMF Factory 4.1 Muffler 042394

    FMF Factory 4.1 Muffler 042394

    FMF

    $599.99
    The FMF Factory 4.1 Muffler delivers a tuned exhaust note that doesn't sacrifice performance—optimized flow characteristics reduce backpressure while maintaining street-legal sound levels. Whether you're maximizing horsepower on the dyno or simply want a...
    18212035
    SKU:
    18212035
    Availability:
    Ships Same Business Day
    Weight:
    7.68 LBS
    PRODUCT NAME:
    MUFFLER
    END CAP STYLE:
    CONICAL
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    COLOR/FINISH:
    SILVER
    MODEL:
    FACTORY 4.1 RCT
    RIDING STYLE:
    OFF-ROAD
    END CAP COLOR/FINISH:
    BLACK
    END CAP MATERIAL:
    CARBON FIBER
    MATERIAL:
    ALUMINUM
    $599.99
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
    Subtotal:
  • FMF Factory 4.1 Muffler 042396 FMF Factory 4.1 Muffler 042396

    FMF Factory 4.1 Muffler 042396

    FMF

    $749.99
    The FMF Factory 4.1 Muffler delivers the performance exhaust flow your engine demands while maintaining street-legal sound levels. This is the choice of professional racers and serious enthusiasts who refuse to compromise between power gains and...
    18212036
    SKU:
    18212036
    Availability:
    Ships Same Business Day
    Weight:
    6.70 LBS
    COLOR/FINISH:
    ANODIZED
    MODEL:
    FACTORY 4.1 RCT
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    END CAP MATERIAL:
    CARBON FIBER
    END CAP STYLE:
    CONICAL
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    COLOR/FINISH:
    BLUE
    END CAP COLOR/FINISH:
    SILVER
    MATERIAL:
    TITANIUM
    $749.99
    Qty in Cart: 0
    Quantity:
    Price:
    $749.99
    Subtotal:
  • FMF Factory 4.1 Muffler 041602

    FMF Factory 4.1 Muffler 041602

    FMF

    $674.99
    The FMF Factory 4.1 Muffler delivers race-proven exhaust flow with minimal back pressure, giving you measurable gains in horsepower and throttle response. Built with premium materials and precision engineering, this bolt-on muffler is designed for riders...
    18212043
    SKU:
    18212043
    Availability:
    Ships Same Business Day
    Weight:
    7.50 LBS
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    $674.99
    Qty in Cart: 0
    Quantity:
    Price:
    $674.99
    Subtotal:
  • FMF Factory 4.1 Muffler 041592

    FMF Factory 4.1 Muffler 041592

    FMF

    $299.99
    If weight and power are your priorities, the FMF Factory 4.1 Muffler delivers both without compromise. The exclusive Chamber Core technology optimizes exhaust flow across the entire RPM range while keeping rotational mass to a minimum—critical for...
    18212018
    SKU:
    18212018
    Availability:
    Ships Same Business Day
    Weight:
    2.66 LBS
    MODEL:
    FACTORY 4.1
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    MATERIAL:
    ALUMINUM
    RIDING STYLE:
    OFF-ROAD
    END CAP MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    $299.99
    Qty in Cart: 0
    Quantity:
    Price:
    $299.99
    Subtotal:
  • FMF Factory 4.1 Muffler 041593

    FMF Factory 4.1 Muffler 041593

    FMF

    $349.99
    If you're serious about extracting maximum power from your machine while cutting parasitic weight, the FMF Factory 4.1 Muffler delivers measurable gains across the entire RPM band—without compromise. This is titanium exhaust engineering built on real...
    18212019
    SKU:
    18212019
    Availability:
    Ships Same Business Day
    Weight:
    2.58 LBS
    END CAP MATERIAL:
    STAINLESS STEEL
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    MATERIAL:
    TITANIUM
    MODEL:
    FACTORY 4.1
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    $349.99
    Qty in Cart: 0
    Quantity:
    Price:
    $349.99
    Subtotal:
  • FMF Factory 4.1 Muffler 041595

    FMF Factory 4.1 Muffler 041595

    FMF

    $349.99
    If you're serious about extracting maximum power from your bike while shedding unnecessary weight, the FMF Factory 4.1 Muffler delivers measurable gains across the entire RPM band. Factory Forward Engineering's proprietary Chamber Core technology...
    18212021
    SKU:
    18212021
    Availability:
    Ships Same Business Day
    Weight:
    3.14 LBS
    COLOR/FINISH:
    TITANIUM
    MUFFLER MATERIAL:
    TITANIUM
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    END CAP MATERIAL:
    STAINLESS STEEL
    COLOR/FINISH:
    ANODIZED
    TYPE:
    SLIP-ON
    MODEL:
    FACTORY 4.1
    UNITS:
    EACH
    $349.99
    Qty in Cart: 0
    Quantity:
    Price:
    $349.99
    Subtotal:
  • FMF Factory 4.1 Muffler 042383

    FMF Factory 4.1 Muffler 042383

    FMF

    $349.99
    If you're serious about extracting maximum power from your bike while shedding unnecessary weight, the FMF Factory 4.1 delivers measurable gains across the entire RPM band. Built from premium American titanium and engineered with exclusive Chamber Core...
    18212023
    SKU:
    18212023
    Availability:
    Ships Same Business Day
    Weight:
    3.57 LBS
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    MODEL:
    FACTORY 4.1
    MUFFLER MATERIAL:
    TITANIUM
    UNITS:
    EACH
    END CAP MATERIAL:
    STAINLESS STEEL
    TYPE:
    SLIP-ON
    $349.99
    Qty in Cart: 0
    Quantity:
    Price:
    $349.99
    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
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
    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 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 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 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:
  • 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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