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 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 -
FMF Factory Fatty Pipe 024073
FMF
$299.99If you're looking to unlock consistent power gains across your entire powerband without compromising on weight, the FMF Factory Fatty Pipe delivers the refined engineering that factory race teams have trusted for decades. Hand-crafted construction and...18201851- SKU:
- 18201851
- Availability:
- Ships Same Business Day
- Weight:
- 5.95 LBS
- MATERIAL:
- STEEL
- TYPE:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- MODEL:
- FACTORY FATTY
- RIDING STYLE:
- OFF-ROAD
$299.99 -
FMF Factory Fatty Pipe 024069
FMF
$289.99The FMF Factory Fatty Pipe delivers the proven performance characteristics of factory racing systems, with a broadened and smoothed power curve that generates gains across your entire power band. Hand-pounded seams and precision material selection create...18201828- SKU:
- 18201828
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- MODEL:
- FACTORY FATTY
- PRODUCT NAME:
- PIPE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- STEEL
- TYPE:
- EXHAUST
$289.99 -
FMF Factory Fatty Pipe - '01-'07 RM125 023058
FMF
$299.99If you're running a 2-stroke dirt bike, your exhaust pipe is where raw engine potential either gets realized or wasted. The FMF Factory Fatty delivers the kind of power curve optimization that separates competitive riders from the rest—smoothing out...18200225- SKU:
- 18200225
- Availability:
- Ships Same Business Day
- Weight:
- 5.50 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MODEL:
- FACTORY FATTY
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
$299.99 -
FMF Powercore 4 Exhaust 044136
FMF
$279.99The FMF Powercore 4 is engineered for 4-stroke engines where every fraction of a second matters. Its computer-designed geometry and dyno-tested architecture deliver measurable gains in power and throttle response by optimizing exhaust scavenging. Built...18200248- SKU:
- 18200248
- Availability:
- Ships Same Business Day
- Weight:
- 3.85 LBS
- FEATURES:
- STANDARD
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- SILVER
- MATERIAL:
- ALUMINUM
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- END CAP STYLE:
- EURO
- TYPE:
- FULL SYSTEM
- UNITS:
- KIT
- MODEL:
- POWERCORE 4
- PRODUCT NAME:
- EXHAUST SYSTEM
- STYLE:
- ELLIPTICAL
$279.99 -
FMF Powercore 4 Exhaust 041178
FMF
$279.99The FMF Powercore 4 is engineered for 4-stroke engines that demand reliable, measurable performance gains. Computer-designed and dyno-tested across multiple applications, this exhaust delivers increased horsepower and torque through optimized gas...18200252- SKU:
- 18200252
- Availability:
- Ships Same Business Day
- Weight:
- 3.33 LBS
- BASE COLOR:
- SILVER
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- MODEL:
- POWERCORE 4
- PRODUCT NAME:
- EXHAUST SYSTEM
- STYLE:
- ELLIPTICAL
- TYPE:
- FULL SYSTEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- END CAP STYLE:
- EURO
- FEATURES:
- STANDARD
- MATERIAL:
- ALUMINUM
- MATERIAL:
- STAINLESS STEEL
$279.99 -
FMF Powercore 4 Exhaust 041179
FMF
$299.99If you're running a 4-stroke machine that demands maximum power delivery and responsiveness, exhaust flow is non-negotiable. The FMF Powercore 4 eliminates restrictive backpressure through computer-optimized design and dyno-validated tuning, translating...18200253- SKU:
- 18200253
- Availability:
- Ships Same Business Day
- Weight:
- 3.86 LBS
- BASE COLOR:
- SILVER
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- MODEL:
- POWERCORE 4
- PRODUCT NAME:
- EXHAUST SYSTEM
- STYLE:
- ELLIPTICAL
- TYPE:
- FULL SYSTEM
- FEATURES:
- WITH SPARK ARRESTOR
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
- END CAP STYLE:
- EURO
- MATERIAL:
- ALUMINUM
$299.99 -
FMF Factory Fatty Pipe 025183
FMF
$299.99If you're running a stock exhaust system, you're leaving measurable power on the table across your entire RPM range. The FMF Factory Fatty Pipe delivers the kind of broad, linear power gains that factory racing teams engineered into their competition...18201683- SKU:
- 18201683
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
- MODEL:
- FACTORY FATTY
- TYPE:
- EXHAUST
- PRODUCT NAME:
- PIPE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- MATERIAL:
- STEEL
$299.99 -
FMF Factory 4.1 RCT Exhaust - Titanium 042398
FMF
$1,224.99The FMF Factory 4.1 RCT Exhaust delivers measurable power gains through optimized scavenging and reduced backpressure, making it the choice for riders demanding real performance improvements. Constructed from premium titanium, this system offers...18201984- SKU:
- 18201984
- Availability:
- Ships Same Business Day
- Weight:
- 8.00 LBS
- END CAP COLOR/FINISH:
- CARBON FIBER
- MATERIAL:
- TITANIUM
- MUFFLER MATERIAL:
- TITANIUM
- UNITS:
- EACH
- MATERIAL:
- CARBON FIBER
- MODEL:
- FACTORY 4.1 RCT
- TYPE:
- FULL SYSTEM
- PIPE MATERIAL:
- TITANIUM
- PRODUCT NAME:
- EXHAUST SYSTEM
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- MUFFLER COLOR/FINISH:
- BLUE ANODIZED
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- MEGABOMB
$1,224.99 -
FMF Factory 4.1 RCT Exhaust - Aluminum 042397
FMF
$974.99The FMF Factory 4.1 RCT Exhaust delivers measurable gains in horsepower and torque while maintaining street-legal sound levels—a rare combination for serious riders who refuse to compromise on performance. Its proven design has been tested in...18201985- SKU:
- 18201985
- Availability:
- Ships Same Business Day
- Weight:
- 12.20 LBS
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- EXHAUST SYSTEM
- END CAP COLOR/FINISH:
- CARBON FIBER
- MATERIAL:
- ALUMINUM
- MATERIAL:
- CARBON FIBER
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER MATERIAL:
- ALUMINUM
- MUFFLER COLOR/FINISH:
- NATURAL
- PIPE MATERIAL:
- STAINLESS STEEL
- TYPE:
- FULL SYSTEM
- DESIGN/CONFIGURATION:
- SINGLE CANISTER
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- MEGABOMB
- UNITS:
- EACH
$974.99 -
FMF Factory 4.1 Exhaust - Anodized Titanium/Stainless Steel 042381
FMF
$459.99If you're running stock exhaust on a performance machine, you're leaving power on the table and adding unnecessary weight to your chassis. The FMF Factory 4.1 delivers measurable horsepower gains while reducing unsprung mass through intelligent...18201967- SKU:
- 18201967
- Availability:
- Ships Same Business Day
- Weight:
- 3.84 LBS
- MODEL:
- FACTORY 4.1
- UNITS:
- EACH
- MUFFLER MATERIAL:
- TITANIUM
- PIPE MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FULL SYSTEM
- END CAP MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- EXHAUST SYSTEM
$459.99 -
FMF 4.1 RCT Exhaust with MegaBomb - Aluminum 044460
FMF
$1,074.99If you're serious about extracting maximum performance from your machine while reducing unsprung weight, the FMF 4.1 RCT is engineered to deliver measurable gains across the entire RPM band. The Factory Forward Engineering approach—moving the muffler...18201931- SKU:
- 18201931
- Availability:
- Ships Same Business Day
- Weight:
- 11.30 LBS
- END CAP MATERIAL:
- CARBON FIBER
- MUFFLER MATERIAL:
- ALUMINUM
- UNITS:
- EACH
- PIPE MATERIAL:
- STAINLESS STEEL
- MODEL:
- FACTORY 4.1 RCT
- MUFFLER COLOR/FINISH:
- RAW
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- EXHAUST SYSTEM
- TYPE:
- FULL SYSTEM
$1,074.99 -
FMF Gnarly Exhaust - Sherco 025265
FMF
$299.99If you're running a 2-stroke in demanding off-road conditions, the FMF Gnarly Exhaust delivers the low-end torque and mid-range pull you need to power through technical terrain. This pipe is engineered specifically to add tractor-like grunt to your...18201944- SKU:
- 18201944
- Availability:
- Ships Same Business Day
- Weight:
- 5.20 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STEEL
- PRODUCT NAME:
- PIPE
- TYPE:
- EXHAUST
$299.99 -
FMF Factory Fatty Pipe 025268
FMF
$299.99If you're chasing consistent power delivery across your entire power band, the FMF Factory Fatty Pipe delivers where it matters most—low-end responsiveness, mid-range punch, and extended over-rev capability. Hand-crafted with factory-team heritage, this...18201945- SKU:
- 18201945
- Availability:
- Ships Same Business Day
- Weight:
- 5.00 LBS
- MATERIAL:
- STEEL
- TYPE:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- PIPE
- MODEL:
- FACTORY FATTY
- RIDING STYLE:
- OFF-ROAD
$299.99 -
FMF Gnarly Exhaust - Beta 025269
FMF
$299.99If you're running a 2-stroke in demanding off-road conditions, you need an exhaust system engineered for low-end grunt rather than peak RPM numbers. The FMF Gnarly delivers the kind of tractor-like torque that gets you out of technical terrain when it...18201946- SKU:
- 18201946
- Availability:
- Ships Same Business Day
- Weight:
- 5.21 LBS
- TYPE:
- EXHAUST
- PRODUCT NAME:
- PIPE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$299.99 -
FMF Gnarly Exhaust - Beta 025270
FMF
$299.99If you're running a 2-stroke in demanding off-road conditions, you need an exhaust built to deliver low-end torque without sacrificing durability. The FMF Gnarly Exhaust is engineered to maximize power in the RPM range where you need it most—climbing...18201947- SKU:
- 18201947
- Availability:
- Ships Same Business Day
- Weight:
- 5.65 LBS
- TYPE:
- EXHAUST
- PRODUCT NAME:
- PIPE
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
$299.99
