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
-
Pro Circuit T-6 Slip-On Exhaust Suzuki RM-Z250 2019-2025 0141925A
PRO CIRCUIT
$799.95The Pro Circuit T-6 Slip-On Exhaust unlocks measurable horsepower and torque gains on your RM-Z250 while delivering a purposeful exhaust note that commands attention. A bolt-on upgrade that requires zero fabrication, this silencer strikes the rare...18211961- SKU:
- 18211961
- Availability:
- Ships Same Business Day
- Weight:
- 10.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- UNITS:
- EACH
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- SILENCER
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- T-6
$799.95 -
Pro Circuit T-4 Slip-On Exhaust Honda CRF450R 2005 4H05450
PRO CIRCUIT
$593.95If you're running a CRF450R, upgrading to the Pro Circuit T-4 slip-on exhaust is one of the most straightforward ways to unlock measurable horsepower gains and sharpen throttle response. The engineered reduction in back pressure translates directly to...18210175- SKU:
- 18210175
- Availability:
- Ships Same Business Day
- Weight:
- 6.00 LBS
- END CAP MATERIAL:
- STAINLESS STEEL
- FEATURES:
- WITH SPARK ARRESTOR
- MODEL:
- T-4
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- MUFFLER MATERIAL:
- ALUMINUM
- PIPE MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- SILENCER
- STYLE:
- ROUND
- UNITS:
- EACH
- MUFFLER COLOR/FINISH:
- POLISHED
$593.95Qty in Cart: 0Quantity:Price:$593.95Subtotal: -
Pro Circuit T-6 Slip-On Exhaust Kawasaki KX250F 2009-2016 0121425A
PRO CIRCUIT
$649.95If you're running a KX250F, factory exhaust is leaving horsepower on the table and adding unnecessary weight to your chassis. The Pro Circuit T-6 slip-on delivers measurable gains in throttle response and mid-range power through optimized exhaust...18211604- SKU:
- 18211604
- Availability:
- Ships Same Business Day
- Weight:
- 9.35 LBS
- PRODUCT NAME:
- SILENCER
- MODEL:
- T-6
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- TYPE:
- SLIP-ON
- END CAP MATERIAL:
- STAINLESS STEEL
- MUFFLER MATERIAL:
- ALUMINUM
$649.95 -
Pro Circuit T-6 Slip-On Exhaust for Suzuki RM-Z450 2018-2025 0141845A
PRO CIRCUIT
$590.95The Pro Circuit T-6 slip-on exhaust delivers measurable gains in horsepower and throttle response while keeping your RM-Z450 street-legal with a removable spark arrestor. This bolt-on upgrade requires zero fabrication, making it an ideal first...18211845- SKU:
- 18211845
- Availability:
- Ships Same Business Day
- Weight:
- 10.00 LBS
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- SILENCER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- UNITS:
- EACH
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- T-6
$590.95Qty in Cart: 0Quantity:Price:$590.95Subtotal: -
FMF Q4 HEX Muffler 042296
FMF
$449.99The FMF Q4 HEX Muffler delivers measurable power gains across your entire RPM range while shedding unnecessary weight—meaning better acceleration and improved handling without sacrificing durability. Its advanced multi-chamber design and proprietary...18211394- SKU:
- 18211394
- Availability:
- Ships Same Business Day
- Weight:
- 7.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MODEL:
- Q4 HEX
- MUFFLER COLOR/FINISH:
- RAW
- MUFFLER MATERIAL:
- ALUMINUM
- WEIGHT IMPERIAL:
- 5.8 LB
- END CAP MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- MUFFLER
- PIPE MATERIAL:
- STAINLESS STEEL
- TYPE:
- SLIP-ON
$449.99 -
FMF Factory 4.1 Muffler 041594
FMF
$299.99If 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 -
FMF Factory 4.1 Muffler 042382
FMF
$299.99If 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
$299.99Qty in Cart: 0Quantity:Price:$299.99Subtotal: -
FMF PowerCore 4 HEX Muffler 043362
FMF
$399.99The FMF PowerCore 4 HEX Muffler delivers measurable gains in power and torque while maintaining the durability required for serious riding. Its Hi-Flo internal core geometry maximizes exhaust scavenging, reducing backpressure and unlocking performance...18211855- SKU:
- 18211855
- Availability:
- Ships Same Business Day
- Weight:
- 6.70 LBS
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- UNITS:
- EACH
- MUFFLER COLOR/FINISH:
- RAW
- MUFFLER MATERIAL:
- ALUMINUM
- PIPE MATERIAL:
- STAINLESS STEEL
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- POWERCORE 4 HEX
$399.99Qty in Cart: 0Quantity:Price:$399.99Subtotal: -
FMF Factory 4.1 RCT Muffler - Anodized Titanium 043365
FMF
$749.99If you're serious about extracting maximum power from your machine while minimizing rotational mass, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM band without compromise. The Resonance Chamber Technology™ design reduces...18211858- SKU:
- 18211858
- Availability:
- Ships Same Business Day
- Weight:
- 6.50 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 -
FMF Factory 4.1 RCT Muffler - Anodized Titanium 045596
FMF
$599.99If you're serious about maximizing power output while minimizing rotational mass, the FMF Factory 4.1 RCT delivers measurable gains across the entire RPM band without the bulk of conventional muffler designs. Its aerospace-grade titanium construction and...18211721- SKU:
- 18211721
- Availability:
- Ships Same Business Day
- Weight:
- 7.05 LBS
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- ANODIZED BLUE
- END CAP MATERIAL:
- TITANIUM
- MUFFLER MATERIAL:
- TITANIUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
$599.99Qty in Cart: 0Quantity:Price:$599.99Subtotal: -
FMF Factory 4.1 RCT Muffler - Aluminum 042330
FMF
$599.99If you're serious about extracting maximum performance from your machine while reducing unsprung weight, the FMF Factory 4.1 RCT delivers across the entire RPM range without compromise. By repositioning the muffler closer to the engine, this system...18211726- SKU:
- 18211726
- Availability:
- Ships Same Business Day
- Weight:
- 7.70 LBS
- END CAP MATERIAL:
- CARBON FIBER
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- RAW
- UNITS:
- EACH
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- MUFFLER
- PIPE MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
$599.99Qty in Cart: 0Quantity:Price:$599.99Subtotal: -
FMF PowerCore 4 HEX Muffler 042309
FMF
$399.99The FMF PowerCore 4 HEX Muffler delivers measurable gains in power and torque while maintaining the durability you need for consistent track or trail performance. Its advanced internal geometry and premium construction eliminate restrictive exhaust...18211521- SKU:
- 18211521
- Availability:
- Ships Same Business Day
- Weight:
- 6.57 LBS
- MUFFLER COLOR/FINISH:
- RAW
- MUFFLER MATERIAL:
- ALUMINUM
- MODEL:
- POWERCORE 4 HEX
- PIPE MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- UNITS:
- EACH
- END CAP MATERIAL:
- STAINLESS STEEL
$399.99 -
FMF Factory 4.1 RCT Muffler - Anodized Titanium 042267
FMF
$749.99If you're serious about extracting maximum horsepower while cutting unnecessary weight, the FMF Factory 4.1 RCT Muffler delivers measurable gains across the entire RPM band without compromise. Its compact, centralized design reduces unsprung mass and...18211227- SKU:
- 18211227
- Availability:
- Ships Same Business Day
- Weight:
- 7.89 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
$749.99Qty in Cart: 0Quantity:Price:$749.99Subtotal: -
FMF Factory 4.1 RCT Muffler - Anodized Titanium 045570
FMF
$649.99If you're running a high-performance build, exhaust flow is where real power gains happen—and the FMF Factory 4.1 RCT delivers across the entire RPM band without adding weight to your chassis. The Resonance Chamber Technology™ design optimizes scavenging...18211644- SKU:
- 18211644
- Availability:
- Ships Same Business Day
- Weight:
- 6.70 LBS
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- ANODIZED BLUE
- PIPE MATERIAL:
- TITANIUM
- END CAP MATERIAL:
- CARBON FIBER
- MUFFLER MATERIAL:
- TITANIUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
$649.99Qty in Cart: 0Quantity:Price:$649.99Subtotal: -
FMF Powercore 4 Muffler 044312
FMF
$359.99If you're looking to unlock measurable power gains across your entire power band without sacrificing durability or rideability, the FMF Powercore 4 Muffler delivers a straightforward performance upgrade that works across all riding styles. The...18211027- SKU:
- 18211027
- Availability:
- Ships Same Business Day
- Weight:
- 5.15 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- STYLE:
- OVAL
- END CAP MATERIAL:
- STAINLESS STEEL
- END CAP STYLE:
- CONICAL
- MODEL:
- POWERCORE 4
- BASE COLOR:
- SILVER
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- MUFFLER
- UNITS:
- EACH
- TYPE:
- SLIP-ON
$359.99 -
FMF Powercore 4 Muffler 044141
FMF
$359.99The FMF Powercore 4 Muffler (044141) delivers measurable horsepower and torque gains across your entire power curve—without sacrificing rideability or forcing you to compromise on durability. Built from aluminum with stainless steel Hi-Flo end caps, this...18210363- SKU:
- 18210363
- Availability:
- Ships Same Business Day
- Weight:
- 6.05 LBS
- BASE COLOR:
- SILVER
- END CAP MATERIAL:
- STAINLESS STEEL
- END CAP STYLE:
- CONICAL
- UNITS:
- EACH
- MODEL:
- POWERCORE 4
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- OVAL
- TYPE:
- SLIP-ON
$359.99 -
FMF Factory 4.1 Muffler - Anodized Titanium 041291
FMF
$499.99The FMF Factory 4.1 Muffler delivers measurable horsepower gains across the entire RPM range while centralizing mass for improved chassis dynamics and handling. Built from anodized titanium, this exhaust component offers the weight savings and durability...18210547- SKU:
- 18210547
- Availability:
- Ships Same Business Day
- Weight:
- 5.69 LBS
- STYLE:
- OVAL
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- END CAP STYLE:
- EURO
- MODEL:
- FACTORY 4.1
- MUFFLER MATERIAL:
- TITANIUM
- UNITS:
- EACH
- END CAP MATERIAL:
- STAINLESS STEEL
- MUFFLER COLOR/FINISH:
- ANODIZED BLUE
- PIPE MATERIAL:
- TITANIUM
$499.99Qty in Cart: 0Quantity:Price:$499.99Subtotal: -
FMF Factory 4.1 Muffler - Anodized Titanium 044235
FMF
$499.99If you're looking to unlock measurable horsepower gains across your entire powerband while reducing unsprung weight, the FMF Factory 4.1 delivers real performance improvements backed by proven engineering. The anodized titanium construction provides...18210584- SKU:
- 18210584
- Availability:
- Ships Same Business Day
- Weight:
- 6.25 LBS
- END CAP STYLE:
- EURO
- MUFFLER COLOR/FINISH:
- ANODIZED BLUE
- MUFFLER MATERIAL:
- TITANIUM
- PIPE MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- END CAP MATERIAL:
- STAINLESS STEEL
- MODEL:
- FACTORY 4.1
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- UNITS:
- EACH
- STYLE:
- OVAL
$499.99Qty in Cart: 0Quantity:Price:$499.99Subtotal: -
FMF Q4 Muffler 041249
FMF
$449.99If you're running off-road, the FMF Q4 Muffler delivers genuine quiet power without the typical performance penalty that comes with most silencers. This muffler absorbs sound through precisely engineered baffles and chambers while maintaining the power...18210653- SKU:
- 18210653
- Availability:
- Ships Same Business Day
- Weight:
- 7.15 LBS
- END CAP STYLE:
- EURO
- MUFFLER COLOR/FINISH:
- RAW
- MUFFLER MATERIAL:
- ALUMINUM
- PIPE MATERIAL:
- STAINLESS STEEL
- BASE COLOR:
- SILVER
- END CAP MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- STYLE:
- OVAL
- TYPE:
- SLIP-ON
- MODEL:
- Q4
- PRODUCT NAME:
- MUFFLER
$449.99Qty in Cart: 0Quantity:Price:$449.99Subtotal: -
FMF Powercore 4 Muffler 041275
FMF
$399.99The FMF Powercore 4 Muffler delivers measurable gains across your entire power curve—horsepower and torque improvements that translate to real-world performance on every ride. Built from lightweight aluminum with stainless steel Hi-Flo end caps, this...18210664- SKU:
- 18210664
- Availability:
- Ships Same Business Day
- Weight:
- 6.31 LBS
- BASE COLOR:
- SILVER
- END CAP MATERIAL:
- STAINLESS STEEL
- END CAP STYLE:
- CONICAL
- UNITS:
- EACH
- MODEL:
- POWERCORE 4
- MUFFLER MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- OVAL
- TYPE:
- SLIP-ON
$399.99
