Dirt Bike Exhaust
Dirt Bike Exhaust Systems at JJ Motorsports
Unlock your dirt bike's potential with high-performance exhaust systems from JJ Motorsports. From slip-on mufflers to full exhaust kits, these components boost horsepower, reduce weight, and deliver aggressive sound for the track or trail. Designed for durability and easy installation, our exhausts ensure better throttle response and emissions compliance while enhancing your ride's style.
Shop trusted brands like Pro Circuit for competition pipes and FMF for titanium systems. Explore related categories such as Dirt Bike Air and Fuel for intake pairing or Dirt Bike Engine for power upgrades.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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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 -
FMF Powercore 4 Muffler 041276
FMF
$399.99If you're looking for measurable power gains across your entire rev range without sacrificing durability or rideability, the FMF Powercore 4 delivers consistent performance whether you're on the track or the trail. The engineering here is...18210665- SKU:
- 18210665
- Availability:
- Ships Same Business Day
- Weight:
- 14.00 LBS
- PRODUCT NAME:
- MUFFLER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- SLIP-ON
- MODEL:
- POWERCORE 4
- MUFFLER MATERIAL:
- ALUMINUM
- STYLE:
- OVAL
- END CAP STYLE:
- CONICAL
- UNITS:
- EACH
- BASE COLOR:
- SILVER
- END CAP MATERIAL:
- STAINLESS STEEL
$399.99 -
FMF Powercore 4 Muffler 042122
FMF
$399.99The FMF Powercore 4 Muffler delivers measurable horsepower and torque gains across the entire power band without sacrificing durability or rideability. Whether you're pushing hard on the track or exploring varying terrain, this exhaust system produces...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
$399.99Qty in Cart: 0Quantity:Price:$399.99Subtotal: -
FMF Powercore 4 Muffler 045135
FMF
$399.99The FMF Powercore 4 Muffler (045135) delivers measurable horsepower and torque gains across your entire power curve—not just at peak RPM—making usable power accessible whether you're cruising, carving canyons, or pushing hard at the track. Its aluminum...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
$399.99Qty in Cart: 0Quantity:Price:$399.99Subtotal: -
FMF Q4 Muffler 041332
FMF
$379.99If you're running off-road and need to meet sound regulations without sacrificing performance, the FMF Q4 Muffler delivers championship-proven quiet power. Developed through years of competitive racing, this muffler uses precision baffle engineering to...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
$379.99Qty in Cart: 0Quantity:Price:$379.99Subtotal: -
FMF PowerBomb Header 041483
FMF
$199.99If you're running a stock or lightly modified exhaust system, you're leaving performance on the table. The FMF PowerBomb Header 041483 leverages FMF's patented expansion chamber technology to unlock up to 10% additional horsepower while simultaneously...18220395- SKU:
- 18220395
- Availability:
- Ships Same Business Day
- Weight:
- 3.16 LBS
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- POWERBOMB
- UNITS:
- EACH
- COLOR/FINISH:
- STAINLESS STEEL
- PRODUCT NAME:
- HEADER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD PIPE
$199.99Qty in Cart: 0Quantity:Price:$199.99Subtotal: -
FMF MegaBomb Header 045592
FMF
$599.99The FMF MegaBomb Header 045592 delivers the low-end torque of a longer header with the high-rpm efficiency of a short design—giving you responsive power across the entire powerband without the vulnerability to damage that comes with extended pipe lengths...18220431- SKU:
- 18220431
- Availability:
- Ships Same Business Day
- Weight:
- 2.99 LBS
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- HEADER
- MODEL:
- MEGABOMB
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$599.99Qty in Cart: 0Quantity:Price:$599.99Subtotal: -
FMF MegaBomb Header - Stainless Steel - '16-'18 KX450F 042338
FMF
$374.99If you're running a '16-'18 KX450F and leaving power on the table in the low-to-mid range, the FMF MegaBomb Header is your answer. This stainless steel header is engineered to boost usable power exactly where you need it most—on the track or trail—while...18220445- SKU:
- 18220445
- Availability:
- Ships Same Business Day
- Weight:
- 3.05 LBS
- COLOR/FINISH:
- STAINLESS STEEL
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- MEGABOMB
- PRODUCT NAME:
- HEADER
- TYPE:
- HEAD PIPE
- WEIGHT IMPERIAL:
- 2 LB
$374.99Qty in Cart: 0Quantity:Price:$374.99Subtotal: -
FMF MegaBomb Header/Mid Pipe - Stainless Steel 045612
FMF
$474.99If you're chasing both low-end torque and high-RPM responsiveness without sacrificing streetability, the FMF MegaBomb delivers dual-header performance in a single package. This stainless steel design pulls mid-range grunt while allowing your motor to...18220448- SKU:
- 18220448
- Availability:
- Ships Same Business Day
- Weight:
- 3.50 LBS
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- HEADER
- RIDING STYLE:
- OFF-ROAD
- WEIGHT IMPERIAL:
- 2.6 LB
- MODEL:
- MEGABOMB
- UNITS:
- EACH
$474.99 -
FMF MegaBomb Header 045622
FMF
$374.99If you're running a sound-restricting muffler setup and need genuine low-end grunt without the bulk of a traditional long header, the FMF MegaBomb 045622 delivers the torque curve you're after. This header bridges the gap between short and long designs,...18220482- SKU:
- 18220482
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
- UNITS:
- EACH
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- MEGABOMB
- PRODUCT NAME:
- HEADER
- RIDING STYLE:
- OFF-ROAD
$374.99Qty in Cart: 0Quantity:Price:$374.99Subtotal: -
FMF MegaBomb Header 045623
FMF
$474.99If you're chasing reliable mid-range power without sacrificing top-end performance, the FMF MegaBomb Header 045623 delivers the best of both worlds. Its titanium construction resists damage far better than traditional long headers while producing the...18220483- SKU:
- 18220483
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- MODEL:
- MEGABOMB
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- HEADER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$474.99Qty in Cart: 0Quantity:Price:$474.99Subtotal: -
FMF MegaBomb Header 045624
FMF
$374.99The FMF MegaBomb Header 045624 delivers the low-end responsiveness of a long header with the high-rpm efficiency of a short design—without the fragility that plagues traditional long headers. If you're running a sound-restricting muffler and need serious...18220484- SKU:
- 18220484
- Availability:
- Ships Same Business Day
- Weight:
- 3.40 LBS
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- MEGABOMB
- PRODUCT NAME:
- HEADER
$374.99 -
FMF MegaBomb Header 045625
FMF
$474.99If you're looking to unlock low-end torque without sacrificing top-end power, the FMF MegaBomb Header 045625 delivers the performance characteristics of both a long and short header in a single, durability-focused design. Ti-Metal construction means you...18220485- SKU:
- 18220485
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- UNITS:
- EACH
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
- MODEL:
- MEGABOMB
- PRODUCT NAME:
- HEADER
$474.99Qty in Cart: 0Quantity:Price:$474.99Subtotal: -
FMF MegaBomb Header 043369
FMF
$474.99If you're running a restrictive muffler setup or need reliable low-end torque without sacrificing top-end power, the FMF MegaBomb Header delivers a rare combination: it produces the aggressive bottom-end response of a long header while maintaining the...18220493- SKU:
- 18220493
- Availability:
- Ships Same Business Day
- Weight:
- 2.35 LBS
- MODEL:
- MEGABOMB
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- HEADER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$474.99 -
FMF PowerBomb Header 041583
FMF
$249.99The FMF PowerBomb Header 041583 delivers measurable performance gains through FMF's patented expansion chamber design, positioned at the header's entry point to optimize exhaust scavenging and flow dynamics. You'll see up to 10% horsepower increase while...18220499- SKU:
- 18220499
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
- MODEL:
- POWERBOMB
- UNITS:
- EACH
- COLOR/FINISH:
- STAINLESS STEEL
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- HEADER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- HEAD PIPE
$249.99Qty in Cart: 0Quantity:Price:$249.99Subtotal: -
FMF MegaBomb Header - Stainless Steel 045644
FMF
$524.99The FMF MegaBomb Header delivers significant gains in bottom-end and mid-range power where it matters most—off the line and through the meat of the RPM band. Its compact design resists damage better than elongated headers while maintaining a tuned...18220509- SKU:
- 18220509
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- MODEL:
- MEGABOMB
- PRODUCT NAME:
- HEADER
$524.99Qty in Cart: 0Quantity:Price:$524.99Subtotal: -
FMF PowerCore 4 HEX Muffler 043370
FMF
$399.99If you're looking to unlock measurable power and torque gains while maintaining reliability on the track or trail, the FMF PowerCore 4 HEX delivers the flow efficiency and durability you need. This muffler combines high-performance engineering with...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
$399.99Qty in Cart: 0Quantity:Price:$399.99Subtotal: -
FMF Fatty Pipe 020135
FMF
$309.99The FMF Fatty Pipe 020135 is engineered to deliver measurable power gains exactly where your machine needs them most—whether you're chasing peak RPM performance or mid-range grunt. Computer-designed and dyno-tested, this exhaust component eliminates...FMFY23- SKU:
- FMFY23
- Availability:
- Ships Same Business Day
- Weight:
- 5.19 LBS
$309.99
