Dirt Bike Exhaust Kits
Dirt Bike Exhaust Kits for Honda CRF & Yamaha YZ at JJ Motorsports
Unlock more power and lighter weight with premium dirt bike exhaust kits from JJ Motorsports, featuring full systems with headers, mid-pipes, and mufflers for superior flow, reduced weight, and aggressive sound in motocross and enduro riding. Compatible with Honda CRF and Yamaha YZ models, these Pro Circuit kits deliver bolt-on gains in horsepower, torque, and throttle response with stainless steel or titanium construction for durability.
Shop Pro Circuit exhaust systems at JJ Motorsports for race-proven performance. Explore related categories such as dirt bike silencers and mufflers for slip-ons or dirt bike air and fuel for tuning essentials.
Top Dirt Bike Exhaust Kits
- Pro Circuit T-6 Exhaust Yamaha YZ125 2014-2023 0111311G – Complete T-6 system with stainless header and aluminum muffler for 2-stroke power gains.
- Pro Circuit Ti-6 Exhaust System Honda CRF250R 2022 0312225F – Titanium full system with hex muffler for lightweight performance and crisp sound.
- Pro Circuit T-6 Exhaust System with Carbon Fiber End Cap Honda CRF450R 2022 0352245F – T-6 system with carbon end cap for reduced weight and premium styling.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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FMF Powercore 4 Exhaust 044272
FMF
$279.99The FMF Powercore 4 delivers measurable horsepower gains through optimized exhaust scavenging and reduced backpressure. Computer-designed internals and dyno-testing across 4-stroke platforms ensure consistent performance improvements without sacrificing...18200739- SKU:
- 18200739
- Availability:
- Ships Same Business Day
- Weight:
- 3.09 LBS
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- MODEL:
- POWERCORE 4
- PRODUCT NAME:
- EXHAUST SYSTEM
- STYLE:
- ELLIPTICAL
- TYPE:
- FULL SYSTEM
- UNITS:
- KIT
- BASE COLOR:
- SILVER
- END CAP STYLE:
- EURO
- FEATURES:
- STANDARD
- MATERIAL:
- ALUMINUM
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
$279.99 -
FMF Factory Fatty Pipe 025121
FMF
$299.99If you're chasing measurable power gains across the entire RPM range, the FMF Factory Fatty Pipe delivers what purpose-built exhaust should: real low-end torque, responsive mid-range pull, and extended top-end performance without compromise. Hand-crafted...18201110- SKU:
- 18201110
- Availability:
- Ships Same Business Day
- Weight:
- 5.10 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- FACTORY FATTY
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
$299.99 -
FMF Factory Fatty Pipe 025133
FMF
$299.99If you're looking to unlock genuine power gains across your entire power band without compromise, the FMF Factory Fatty Pipe delivers the low-end response, mid-range punch, and top-end over-rev that serious riders demand. Built using the same handcrafted...18201114- SKU:
- 18201114
- Availability:
- Ships Same Business Day
- Weight:
- 6.75 LBS
- PRODUCT NAME:
- PIPE
- MODEL:
- FACTORY FATTY
- TYPE:
- EXHAUST
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$299.99 -
FMF Factory Fatty Pipe 025090
FMF
$299.99If you're looking to unlock measurable power gains across your entire powerband without compromise, the FMF Factory Fatty Pipe delivers the performance characteristics once reserved for factory racing teams. Hand-crafted with the same attention to detail...18200496- SKU:
- 18200496
- Availability:
- Ships Same Business Day
- Weight:
- 3.06 LBS
- TYPE:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- MATERIAL:
- STEEL
- MODEL:
- FACTORY FATTY
- RIDING STYLE:
- OFF-ROAD
$299.99 -
FMF Powercore 4 Exhaust 040011
FMF
$299.99The FMF Powercore 4 Exhaust is engineered to maximize exhaust scavenging on 4-stroke engines, translating directly into measurable horsepower and torque gains across the entire RPM band. By reducing backpressure through high-flow design and computer...18201317- SKU:
- 18201317
- Availability:
- Ships Same Business Day
- Weight:
- 3.56 LBS
- MATERIAL:
- STAINLESS STEEL
- STYLE:
- ELLIPTICAL
- END CAP STYLE:
- EURO
- MATERIAL:
- ALUMINUM
- BASE COLOR:
- SILVER
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- MODEL:
- POWERCORE 4
- PRODUCT NAME:
- EXHAUST SYSTEM
- FEATURES:
- WITH SPARK ARRESTOR
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FULL SYSTEM
- UNITS:
- KIT
$299.99 -
FMF Powercore 4 Exhaust 040072
FMF
$279.99The FMF Powercore 4 exhaust system is engineered to extract measurable performance gains from your 4-stroke engine by optimizing exhaust gas flow and reducing backpressure. Computer-designed and dyno-tested across multiple platforms, this system delivers...18201341- SKU:
- 18201341
- Availability:
- Ships Same Business Day
- Weight:
- 4.10 LBS
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- FEATURES:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BASE COLOR:
- SILVER
- MODEL:
- POWERCORE 4
- PRODUCT NAME:
- EXHAUST SYSTEM
- TYPE:
- FULL SYSTEM
- END CAP STYLE:
- EURO
- MATERIAL:
- ALUMINUM
- MATERIAL:
- STAINLESS STEEL
- STYLE:
- ELLIPTICAL
$279.99 -
FMF Factory Fatty Pipe 025101
FMF
$289.99The FMF Factory Fatty Pipe delivers a broader, smoother power curve across your entire RPM range—exactly what factory racing teams engineered decades ago. By reducing restriction and optimizing flow transitions, you'll gain measurable low-end torque,...18201385- SKU:
- 18201385
- Availability:
- Ships Same Business Day
- Weight:
- 2.34 LBS
- TYPE:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- MATERIAL:
- STEEL
- MODEL:
- FACTORY FATTY
- RIDING STYLE:
- OFF-ROAD
$289.99 -
FMF Powercore 4 Exhaust 041501
FMF
$279.99If you're running a 4-stroke engine and leaving performance on the table, your exhaust system is likely the culprit. The FMF Powercore 4 delivers measurable gains in power and throttle response through optimized gas scavenging and reduced...18201402- SKU:
- 18201402
- Availability:
- Ships Same Business Day
- Weight:
- 3.37 LBS
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- FEATURES:
- STANDARD
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- ELLIPTICAL
- BASE COLOR:
- SILVER
- END CAP STYLE:
- EURO
- MATERIAL:
- ALUMINUM
- TYPE:
- FULL SYSTEM
- UNITS:
- KIT
- MODEL:
- POWERCORE 4
- PRODUCT NAME:
- EXHAUST SYSTEM
$279.99 -
FMF Powercore 4 Exhaust 041502
FMF
$299.99The FMF Powercore 4 Exhaust is engineered for 4-stroke engines that demand measurable gains in airflow and horsepower. Its computer-designed architecture and dyno-tested construction deliver real performance improvements—not marketing promises—while the...18201403- SKU:
- 18201403
- Availability:
- Ships Same Business Day
- Weight:
- 3.99 LBS
- BASE COLOR:
- SILVER
- MODEL:
- POWERCORE 4
- PRODUCT NAME:
- EXHAUST SYSTEM
- TYPE:
- FULL SYSTEM
- FEATURES:
- WITH SPARK ARRESTOR
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
- STYLE:
- ELLIPTICAL
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- END CAP STYLE:
- EURO
- MATERIAL:
- ALUMINUM
$299.99 -
FMF Factory Fatty Pipe - KX85/100 022062
FMF
$299.99If you're running a KX85 or KX100, the FMF Factory Fatty Pipe delivers the kind of power band refinement that separates competitive riders from the rest. By smoothing out the entire power curve—not just chasing peak numbers—you'll gain usable low-end...18201538- SKU:
- 18201538
- Availability:
- Ships Same Business Day
- Weight:
- 4.75 LBS
- MATERIAL:
- STEEL
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
- MODEL:
- FACTORY FATTY
- RIDING STYLE:
- OFF-ROAD
$299.99 -
FMF Powercore 4 Exhaust 041534
FMF
$299.99The FMF Powercore 4 is engineered for 4-stroke engines where measurable power gains and reliable durability matter. Its computer-optimized design and dyno-tested performance ensure you're not guessing—you're upgrading with data-backed results. Whether...18201543- SKU:
- 18201543
- Availability:
- Ships Same Business Day
- Weight:
- 3.80 LBS
- END CAP STYLE:
- EURO
- MATERIAL:
- ALUMINUM
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- MATERIAL:
- STAINLESS STEEL
- STYLE:
- ELLIPTICAL
- BASE COLOR:
- SILVER
- MODEL:
- POWERCORE 4
- PRODUCT NAME:
- EXHAUST SYSTEM
- FEATURES:
- WITH SPARK ARRESTOR
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FULL SYSTEM
- UNITS:
- KIT
$299.99 -
FMF Factory Fatty Pipe - '13-'19 RR250/300 025157
FMF
$299.99If you're running a '13-'19 RR250/300 and want measurable power gains across the entire rev range, the FMF Factory Fatty Pipe delivers the low-end grunt, mid-range response, and top-end extension you need without compromising rideability. This isn't a...18201487- SKU:
- 18201487
- Availability:
- Ships Same Business Day
- Weight:
- 6.68 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MODEL:
- FACTORY FATTY
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
$299.99 -
FMF Gnarly Pipe 025218
FMF
$299.99If you're running a 2-stroke in serious terrain, you know the power delivery can feel peaky and unpredictable when you need raw pulling power to claw out of ruts and rocky sections. The FMF Gnarly Pipe delivers the low-end torque and mid-range grunt that...18201790- SKU:
- 18201790
- Availability:
- Ships Same Business Day
- Weight:
- 9.30 LBS
- COLOR/FINISH:
- NICKEL-PLATED
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- MODEL:
- GNARLY
$299.99 -
FMF Factory Fatty Pipe 025219
FMF
$299.99The FMF Factory Fatty Pipe delivers a broader, smoother power curve across the entire rev range—giving you more usable low-end torque, stronger mid-range response, and extended over-rev capability. Hand-crafted with the same precision as factory racing...18201791- SKU:
- 18201791
- Availability:
- Ships Same Business Day
- Weight:
- 5.25 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MODEL:
- FACTORY FATTY
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
$299.99 -
FMF Fatty Pipe 025221
FMF
$299.99The FMF Fatty Pipe 025221 is computer-designed and dyno-tested to extract power exactly where your machine needs it most. Built with 19-gauge steel and finished in durable nickel plating, this pipe combines structural integrity with proven performance...18201792- SKU:
- 18201792
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- COLOR/FINISH:
- NICKEL-PLATED
- MODEL:
- GOLD SERIES FATTY
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- DESIGN/CONFIGURATION:
- 1-INTO-1 SYSTEM
- PRODUCT NAME:
- PIPE
- UNITS:
- EACH
$299.99 -
FMF Factory Fatty Big Bore Exhaust 025224
FMF
$299.99The FMF Factory Fatty Big Bore Exhaust is engineered for riders who demand measurable gains in power delivery and throttle response without sacrificing durability. Built using the same construction methods trusted by professional racers, this exhaust...18201794- SKU:
- 18201794
- Availability:
- Ships Same Business Day
- Weight:
- 4.01 LBS
- PRODUCT NAME:
- PIPE
- MODEL:
- BIG BORE
- MODEL:
- FACTORY FATTY
- TYPE:
- EXHAUST
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$299.99 -
FMF Factory Fatty Pipe - 65SX/TC65 025198
FMF
$289.99If you're riding a 65SX or TC65, the Factory Fatty Pipe delivers the kind of power curve refinement that separates competitive riders from the rest. This hand-crafted exhaust broadens your power delivery across the entire band—more low-end grunt, more...18201693- SKU:
- 18201693
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
- MODEL:
- FACTORY FATTY
- TYPE:
- EXHAUST
- PRODUCT NAME:
- PIPE
- UNITS:
- EACH
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$289.99 -
FMF Factory Fatty Pipe 025204
FMF
$299.99The FMF Factory Fatty Pipe delivers measurable power gains across the entire RPM range—from low-end grunt to high-RPM over-rev—without sacrificing the smooth, linear power delivery that professional and recreational riders demand. Built using the same...18201714- SKU:
- 18201714
- Availability:
- Ships Same Business Day
- Weight:
- 6.90 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
- MODEL:
- FACTORY FATTY
$299.99 -
FMF Factory Fatty Rev Pipe 022064
FMF
$299.99If you're hunting for mid-to-top-end power delivery, the FMF Factory Fatty Rev Pipe is engineered to extend your power band and reduce shift frequency—critical advantages in deep berms and sand riding where sustained acceleration matters. Built with FMF...18201715- SKU:
- 18201715
- Availability:
- Ships Same Business Day
- Weight:
- 5.00 LBS
- MODEL:
- FACTORY FATTY REV
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
$299.99 -
FMF Factory 4.1 RCT Exhaust - Titanium 042378
FMF
$1,199.99If you're running a high-performance off-road bike, you need an exhaust system that doesn't force you to choose between power and compliance. The FMF Factory 4.1 RCT delivers full power across the entire RPM range while meeting strict AMA and FIM sound...18201901- SKU:
- 18201901
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- MATERIAL:
- CARBON FIBER
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- ANODIZED BLUE
- TYPE:
- FULL SYSTEM
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- RIDING STYLE:
- OFF-ROAD
- PIPE MATERIAL:
- TITANIUM
- PRODUCT NAME:
- EXHAUST SYSTEM
- END CAP MATERIAL:
- CARBON FIBER
- MATERIAL:
- TITANIUM
- MUFFLER MATERIAL:
- TITANIUM
- STYLE:
- MEGABOMB
- UNITS:
- EACH
$1,199.99
