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
-
FMF Powercore 4 Exhaust 041533
FMF
$279.99If you're running a 4-stroke and leaving power on the table with a restrictive exhaust, the FMF Powercore 4 is engineered to unlock measurable gains through optimized gas scavenging and flow dynamics. Every component—from the hi-flo end cap to the...18201539- SKU:
- 18201539
- Availability:
- Ships Same Business Day
- Weight:
- 3.42 LBS
- END CAP STYLE:
- EURO
- MATERIAL:
- ALUMINUM
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- MATERIAL:
- STAINLESS STEEL
- STYLE:
- ELLIPTICAL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FULL SYSTEM
- UNITS:
- KIT
- BASE COLOR:
- SILVER
- FEATURES:
- STANDARD
- MODEL:
- POWERCORE 4
- PRODUCT NAME:
- EXHAUST SYSTEM
$279.99 -
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
$299.99Qty in Cart: 0Quantity:Price:$299.99Subtotal: -
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 -
FMF Fatty Pipe 025238
FMF
$299.99The FMF Fatty Pipe 025238 is engineered to smooth and broaden your power curve across the entire rev range, delivering measurable gains in low-end tractability, mid-range response, and top-end over-rev. If you're serious about maximizing performance...18201865- SKU:
- 18201865
- Availability:
- Ships Same Business Day
- Weight:
- 3.35 LBS
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
- MODEL:
- FATTY
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- CARBON STEEL
- UNITS:
- EACH
$299.99 -
FMF Factory Fatty Pipe 025239
FMF
$299.99If you're looking to unlock consistent power gains across your entire power band without sacrificing low-end response, the FMF Factory Fatty Pipe delivers exactly what modern riders demand. By smoothing out the power curve from bottom to top, this pipe...18201866- SKU:
- 18201866
- Availability:
- Ships Same Business Day
- Weight:
- 3.50 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- FACTORY FATTY
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
$299.99 -
FMF Factory Fatty Rev Pipe 025240
FMF
$299.99If you're losing power in the mid-to-upper RPM range or spending too much time between gear changes, the FMF Factory Fatty Rev Pipe delivers the midrange and top-end response you need to stay competitive. Built specifically for deep berms and sand riding...18201867- SKU:
- 18201867
- Availability:
- Ships Same Business Day
- Weight:
- 2.94 LBS
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- FACTORY FATTY REV
- MATERIAL:
- STEEL
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
- UNITS:
- EACH
$299.99 -
FMF Fatty Pipe 025241
FMF
$299.99The FMF Fatty Pipe 025241 is built on over 35 years of proven race track performance, delivering consistent power gains across your entire power band. Whether you're chasing low-end torque, mid-range punch, or top-end revs, this pipe smooths out your...18201868- SKU:
- 18201868
- Availability:
- Ships Same Business Day
- Weight:
- 5.05 LBS
- MATERIAL:
- CARBON STEEL
- UNITS:
- EACH
- MODEL:
- FATTY
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
$299.99 -
FMF Gnarly Pipe 025242
FMF
$299.99If you're running tight tracks or aggressive off-road terrain, the FMF Gnarly Pipe 025242 delivers the low-end torque and mid-range punch your engine needs to stay competitive. This pipe is engineered specifically for tractability—meaning better throttle...18201869- SKU:
- 18201869
- Availability:
- Ships Same Business Day
- Weight:
- 5.60 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- COLOR/FINISH:
- NICKEL-PLATED
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
- MODEL:
- GNARLY
$299.99 -
FMF Factory Fatty Pipe 025243
FMF
$299.99If you're running a stock exhaust pipe, you're leaving power on the table across your entire RPM range. The FMF Factory Fatty delivers a broader, smoother power curve with measurable gains in low-end torque, mid-range response, and top-end...18201870- SKU:
- 18201870
- Availability:
- Ships Same Business Day
- Weight:
- 5.15 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
- MODEL:
- FACTORY FATTY
$299.99 -
FMF 4.1 RCT Exhaust with MegaBomb - Aluminum 044456
FMF
$1,074.99If you're serious about extracting maximum performance from your machine, the FMF 4.1 RCT Exhaust with MegaBomb delivers power gains across the entire RPM band while shaving unnecessary weight. The factory-engineered geometry and aerospace-grade...18201840- SKU:
- 18201840
- Availability:
- Ships Same Business Day
- Weight:
- 7.90 LBS
- END CAP MATERIAL:
- CARBON FIBER
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- RAW
- MUFFLER MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PIPE MATERIAL:
- STAINLESS STEEL
- TYPE:
- FULL SYSTEM
- PRODUCT NAME:
- EXHAUST SYSTEM
$1,074.99 -
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium 044457
FMF
$1,374.99If you're running a high-performance machine that demands peak power delivery across the entire RPM range, the FMF 4.1 RCT is engineered to unlock measurable gains without the weight penalty of conventional systems. By centralizing mass through Factory...18201841- SKU:
- 18201841
- Availability:
- Ships Same Business Day
- Weight:
- 7.80 LBS
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- ANODIZED BLUE
- TYPE:
- FULL SYSTEM
- RIDING STYLE:
- OFF-ROAD
- PIPE MATERIAL:
- TITANIUM
- PRODUCT NAME:
- EXHAUST SYSTEM
- END CAP MATERIAL:
- CARBON FIBER
- MUFFLER MATERIAL:
- TITANIUM
- UNITS:
- EACH
$1,374.99 -
FMF 4.1 RCT Exhaust with MegaBomb - Anodized Titanium 042373
FMF
$1,224.99If you're serious about two-stroke performance, exhaust system choice directly impacts your power delivery, weight, and handling characteristics. The FMF 4.1 RCT delivers measurable gains across the entire RPM range while shaving pounds and relocating...18201844- SKU:
- 18201844
- Availability:
- Ships Same Business Day
- Weight:
- 8.95 LBS
- PIPE MATERIAL:
- TITANIUM
- PRODUCT NAME:
- EXHAUST SYSTEM
- TYPE:
- FULL SYSTEM
- MUFFLER MATERIAL:
- TITANIUM
- END CAP MATERIAL:
- CARBON FIBER
- UNITS:
- EACH
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- ANODIZED BLUE
- RIDING STYLE:
- OFF-ROAD
$1,224.99
