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 042392
FMF
$399.99The FMF Powercore 4 Muffler delivers the performance exhaust solution you need when stock silencers are holding back your engine's potential. This proven design reduces backpressure while maintaining streetable sound levels, giving you measurable...18212038- SKU:
- 18212038
- Availability:
- Ships Same Business Day
- Weight:
- 6.60 LBS
- MUFFLER MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- PIPE MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- POWERCORE 4
$399.99 -
FMF Powercore 4 Muffler 041600
FMF
$399.99The FMF Powercore 4 delivers the exhaust flow efficiency and sound character that serious riders demand. Whether you're chasing lap times on the track or maximizing mid-range punch on the street, this muffler combines proven silencing technology with...18212041- SKU:
- 18212041
- Availability:
- Ships Same Business Day
- Weight:
- 6.80 LBS
- MUFFLER MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- PIPE MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- POWERCORE 4
- TYPE:
- SLIP-ON
$399.99 -
FMF Q4 Muffler 041601
FMF
$449.99If you're running a high-performance machine, your exhaust system is either working for you or against you. The FMF Q4 Muffler delivers a significant reduction in backpressure while maintaining sound control, giving you the horsepower gains and throttle...18212042- SKU:
- 18212042
- Availability:
- Ships Same Business Day
- Weight:
- 7.30 LBS
- MODEL:
- Q4 HEX
- TYPE:
- SLIP-ON
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- END CAP MATERIAL:
- STAINLESS STEEL
- END CAP STYLE:
- SLASH-CUT
$449.99 -
FMF Factory 4.1 Muffler 041602
FMF
$674.99The 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 -
FMF Powercore 4 with Spark Arrestor 043376
FMF
$399.99If you're running a high-performance engine, your exhaust system directly impacts how much power and torque you can extract. The FMF Powercore 4 delivers measurable gains through optimized flow dynamics and advanced internal packing, while the included...18212016- SKU:
- 18212016
- Availability:
- Ships Same Business Day
- Weight:
- 7.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- MUFFLER MATERIAL:
- ALUMINUM
- PIPE MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- MUFFLER
- BASE COLOR:
- SILVER
- UNITS:
- EACH
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- POWERCORE 4
$399.99 -
FMF Q4 Muffler 043377
FMF
$449.99If you're running off-road or track applications where exhaust noise and backpressure directly impact performance, the FMF Q4 delivers championship-proven silencing without sacrificing flow. Engineered through years of competitive racing, this muffler...18212017- SKU:
- 18212017
- Availability:
- Ships Same Business Day
- Weight:
- 7.00 LBS
- END CAP STYLE:
- CONICAL
- MODEL:
- Q4
- MUFFLER MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- PIPE MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- BASE COLOR:
- SILVER
- END CAP MATERIAL:
- STAINLESS STEEL
- MUFFLER COLOR/FINISH:
- RAW
$449.99 -
FMF Factory 4.1 Muffler 041592
FMF
$299.99If 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 -
FMF Factory 4.1 Muffler 041593
FMF
$349.99If 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 -
FMF Factory 4.1 Muffler 041595
FMF
$349.99If 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 -
FMF Factory 4.1 Muffler 042383
FMF
$349.99If 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 -
FMF Powercore 4 Muffler 041596
FMF
$399.99The FMF Powercore 4 Muffler delivers measurable gains in power and torque while maintaining durability through punishing riding conditions. Built with premium stainless steel and aluminum construction, this muffler combines lightweight design with...18212026- SKU:
- 18212026
- Availability:
- Ships Same Business Day
- Weight:
- 6.30 LBS
- BASE COLOR:
- SILVER
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- POWERCORE 4
- TYPE:
- SLIP-ON
- END CAP STYLE:
- CONICAL
- MUFFLER MATERIAL:
- ALUMINUM
- PIPE MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$399.99 -
FMF Q4 Muffler 042393
FMF
$449.99The FMF Q4 Muffler delivers competition-proven exhaust flow optimization without sacrificing street-legal sound levels, making it the ideal choice for riders who demand both performance and practicality. By reducing backpressure while maintaining a...18212039- SKU:
- 18212039
- Availability:
- Ships Same Business Day
- Weight:
- 25.00 LBS
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- Q4 HEX
- TYPE:
- SLIP-ON
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- END CAP STYLE:
- SLASH-CUT
$449.99 -
FMF Powercore 4 Muffler 043379
FMF
$399.99The FMF Powercore 4 Muffler delivers the exhaust scavenging efficiency and low-end torque response that serious riders demand, without sacrificing street legality or reliability. Its proven internal core design maximizes flow while maintaining effective...18212040- SKU:
- 18212040
- Availability:
- Ships Same Business Day
- Weight:
- 7.30 LBS
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- POWERCORE 4
- TYPE:
- SLIP-ON
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MUFFLER MATERIAL:
- ALUMINUM
- PIPE MATERIAL:
- STAINLESS STEEL
$399.99 -
FMF Q4 Muffler 041597
FMF
$449.99If you're running serious off-road miles, exhaust noise and premature packing degradation will compromise both your riding experience and your bike's longevity. The FMF Q4 Muffler delivers championship-proven sound suppression through a twin-stage core...18212029- SKU:
- 18212029
- Availability:
- Ships Same Business Day
- Weight:
- 6.20 LBS
- PRODUCT NAME:
- MUFFLER
- MODEL:
- Q4
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
$449.99 -
FMF PowerCore 4 HEX Muffler 041586
FMF
$399.99The 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 -
FMF Factory 4.1 RCT Muffler - Aluminum 043364
FMF
$599.99If 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 Technology™ 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
$599.99Qty in Cart: 0Quantity:Price:$599.99Subtotal: -
FMF PowerCore 4 HEX Muffler 044451
FMF
$399.99The 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 -
FMF Q4 HEX Muffler 044452
FMF
$449.99The FMF Q4 HEX Muffler delivers measurable power gains across the entire RPM range while reducing weight and noise—letting you feel the performance benefits rather than just hear them. Its multi-stage packing and proprietary chamber design maximize...18211882- SKU:
- 18211882
- Availability:
- Ships Same Business Day
- Weight:
- 7.20 LBS
- END CAP MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- MODEL:
- Q4 HEX
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- MUFFLER
- MUFFLER COLOR/FINISH:
- RAW
- PIPE MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
$449.99Qty in Cart: 0Quantity:Price:$449.99Subtotal: -
FMF Factory 4.1 RCT Muffler - Anodized Titanium 044455
FMF
$849.99If 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 -
FMF PowerCore 4 HEX Muffler 042367
FMF
$399.99If 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
