Select Your Ride

1
2
3

FMF Factory 4.1 Mufflers

FMF Factory 4.1 Mufflers

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • 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 Factory 4.1 RCT Muffler - Aluminum 045594

    FMF Factory 4.1 RCT Muffler - Aluminum 045594

    FMF

    $549.99
    If you're serious about performance, exhaust system design directly impacts your power output across the entire RPM band. The FMF Factory 4.1 RCT eliminates the compromises of heavier, longer mufflers by combining advanced acoustic engineering with...
    18211719
    SKU:
    18211719
    Availability:
    Ships Same Business Day
    Weight:
    6.05 LBS
    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
    $549.99
    Qty in Cart: 0
    Quantity:
    Price:
    $549.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 042286

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 042286

    FMF

    $749.99
    If you're serious about maximizing your engine's output while minimizing weight, the FMF Factory 4.1 RCT Muffler delivers measurable performance gains across the entire RPM range without the bulk of traditional exhausts. Its compact design centralizes...
    18211337
    SKU:
    18211337
    Availability:
    Ships Same Business Day
    Weight:
    8.20 LBS
    PIPE MATERIAL:
    TITANIUM
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    MUFFLER MATERIAL:
    TITANIUM
    PRODUCT NAME:
    MUFFLER
    TYPE:
    SLIP-ON
    $749.99
    Qty in Cart: 0
    Quantity:
    Price:
    $749.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 045586

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 045586

    FMF

    $649.99
    If you're serious about extracting maximum power from your machine while cutting unnecessary weight, the FMF Factory 4.1 RCT Muffler delivers real gains across the entire RPM band. Built from aerospace-grade titanium and engineered in Southern...
    18211698
    SKU:
    18211698
    Availability:
    Ships Same Business Day
    Weight:
    7.05 LBS
    END CAP MATERIAL:
    CARBON FIBER
    MUFFLER MATERIAL:
    TITANIUM
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    ANODIZED BLUE
    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 042259

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 042259

    FMF

    $749.99
    If you're serious about extracting maximum power from your machine while reducing unsprung weight, the FMF Factory 4.1 RCT muffler delivers measurable gains across the entire RPM band—without compromise. The aerospace-grade titanium construction and...
    18211222
    SKU:
    18211222
    Availability:
    Ships Same Business Day
    Weight:
    7.89 LBS
    PRODUCT NAME:
    MUFFLER
    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
    RIDING STYLE:
    OFF-ROAD
    $749.99
    Qty in Cart: 0
    Quantity:
    Price:
    $749.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 041517

    FMF Factory 4.1 RCT Muffler - Aluminum 041517

    FMF

    $599.99
    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. The advanced Resonance Chamber Technologyâ„¢ design optimizes exhaust...
    18211563
    SKU:
    18211563
    Availability:
    Ships Same Business Day
    Weight:
    9.05 LBS
    END CAP MATERIAL:
    STAINLESS STEEL
    PIPE MATERIAL:
    STAINLESS STEEL
    MODEL:
    FACTORY 4.1 RCT
    MUFFLER COLOR/FINISH:
    RAW
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    $599.99
    Qty in Cart: 0
    Quantity:
    Price:
    $599.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Anodized Titanium 045561

    FMF Factory 4.1 RCT Muffler - Anodized Titanium 045561

    FMF

    $649.99
    If you're serious about extracting maximum power while keeping weight down, the FMF Factory 4.1 RCT Muffler delivers measurable gains across the entire RPM band without the fragility of longer designs. By centralizing mass closer to the engine through...
    18211631
    SKU:
    18211631
    Availability:
    Ships Same Business Day
    Weight:
    6.00 LBS
    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
    UNITS:
    EACH
    PIPE MATERIAL:
    TITANIUM
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    $649.99
    Qty in Cart: 0
    Quantity:
    Price:
    $649.99
    Subtotal:
  • FMF Factory 4.1 RCT Muffler - Aluminum 045558

    FMF Factory 4.1 RCT Muffler - Aluminum 045558

    FMF

    $549.99
    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 range without compromise. By centralizing mass closer to the motor and...
    18211633
    SKU:
    18211633
    Availability:
    Ships Same Business Day
    Weight:
    6.12 LBS
    END CAP MATERIAL:
    CARBON FIBER
    MODEL:
    FACTORY 4.1 RCT
    RIDING STYLE:
    ADVENTURE TOURING / DUAL-SPORT
    UNITS:
    EACH
    MUFFLER MATERIAL:
    ALUMINUM
    PRODUCT NAME:
    MUFFLER
    MUFFLER COLOR/FINISH:
    RAW
    PIPE MATERIAL:
    STAINLESS STEEL
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    SLIP-ON
    $549.99
    Qty in Cart: 0
    Quantity:
    Price:
    $549.99
    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 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 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 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 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 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 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 Factory 4.1 Muffler 041594

    FMF Factory 4.1 Muffler 041594

    FMF

    $299.99
    If you're serious about extracting peak performance from your machine while shedding unnecessary weight, the FMF Factory 4.1 Muffler is engineered to deliver. This titanium exhaust system improves horsepower across the entire RPM range while keeping your...
    18212020
    SKU:
    18212020
    Availability:
    Ships Same Business Day
    Weight:
    3.16 LBS
    MUFFLER MATERIAL:
    ALUMINUM
    MODEL:
    FACTORY 4.1
    TYPE:
    SLIP-ON
    UNITS:
    EACH
    COLOR/FINISH:
    STAINLESS STEEL
    END CAP MATERIAL:
    STAINLESS STEEL
    PRODUCT NAME:
    MUFFLER
    RIDING STYLE:
    OFF-ROAD
    $299.99
    Qty in Cart: 0
    Quantity:
    Price:
    $299.99
    Subtotal:
  • FMF Factory 4.1 Muffler 042382

    FMF Factory 4.1 Muffler 042382

    FMF

    $299.99
    If you're serious about extracting maximum power from your machine while keeping weight to an absolute minimum, the FMF Factory 4.1 delivers on both fronts. This muffler improves horsepower across the entire rpm range, giving you measurable performance...
    18212022
    SKU:
    18212022
    Availability:
    Ships Same Business Day
    Weight:
    3.71 LBS
    MUFFLER MATERIAL:
    ALUMINUM
    END CAP MATERIAL:
    STAINLESS STEEL
    TYPE:
    SLIP-ON
    MODEL:
    FACTORY 4.1
    PRODUCT NAME:
    MUFFLER
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    $299.99
    Qty in Cart: 0
    Quantity:
    Price:
    $299.99
    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

SECURE & SAFE PAYMENT

EASY RETURNS

FAST DELIVERY

AUTHORIZED DEALER