Dirt Bike Exhaust Replacement Parts
Dirt Bike Exhaust Replacement Parts: O-Rings, Springs & Packing for FMF & Moose at JJ Motorsports
Keep your dirt bike's exhaust system in top shape with premium replacement parts from JJ Motorsports, designed for easy maintenance and peak performance in motocross, enduro, and trail riding. Our selection includes durable O-rings, heavy-duty springs, and high-performance packing materials for secure seals, vibration resistance, and heat insulation. Compatible with FMF and Moose Racing mufflers on Honda CRF, Yamaha YZ/WR, KTM SX/EXC, and more, these OEM-quality components ensure leak-free operation, reduced noise, and long-lasting durability in dusty, high-heat conditions. From FMF's silicone O-rings for end cap seals to Moose's 95mm springs and Spec 19 packing for quick re-packs, refresh your exhaust without the hassle of full replacements.
Shop trusted brands like FMF and Moose Racing for race-proven quality. Explore related categories such as dirt bike silencers and mufflers for full systems or dirt bike exhaust for headers and tips.
Top Dirt Bike Exhaust Replacement Parts
- FMF Exhaust O-Rings 014893 – Silicone O-ring set for FMF muffler end caps; ensures airtight seals and vibration resistance for reliable performance.
- Moose Racing Exhaust Springs 95mm 495-9500 – Heavy-duty 95mm springs for secure muffler mounting; zinc-plated for corrosion resistance and easy installation.
- Moose Racing Spec 19 Competition Packing 750g 14584 – High-temp fiberglass packing for 2-stroke mufflers; 750g jar provides multiple re-packs for sustained sound and flow.
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 RCT End Cap - Titanium 040642
FMF
$59.99A quality exhaust end cap protects your muffler canister from corrosion, road debris, and premature deterioration while maintaining the clean aesthetic of your system. The FMF RCT titanium construction delivers superior heat resistance and durability...18600562- SKU:
- 18600562
- Availability:
- Ships Same Business Day
- Weight:
- 0.64 LBS
- OUTSIDE DIAMETER IMPERIAL:
- 4'
- TYPE:
- EXHAUST
- END CAP STYLE:
- EURO
- PRODUCT NAME:
- END CAP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- FACTORY 4.1 RCT
- MATERIAL:
- TITANIUM
$59.99 -
FMF Muffler Sleeve - Aluminum 040650
FMF
$19.99Exhaust system performance depends on a properly functioning mid-pipe, and worn sleeves compromise both flow efficiency and structural integrity. The FMF Muffler Sleeve (040650) restores your exhaust system to factory specifications, eliminating leaks...18600580- SKU:
- 18600580
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- ALUMINUM
- STYLE:
- ROUND
- LENGTH IMPERIAL:
- 4'
- PRODUCT NAME:
- INSERT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- TYPE:
- MID PIPE INLET SLEEVE INSERT
$19.99Qty in Cart: 0Quantity:Price:$19.99Subtotal: -
FMF Muffler Sleeve - Aluminum 040654
FMF
$19.99Worn exhaust sleeves compromise flow efficiency and can lead to costly mid-pipe replacements. The FMF Muffler Sleeve restores your exhaust system's structural integrity and thermal protection without requiring a full mid-pipe swap. If you're running an...18600584- SKU:
- 18600584
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- INSERT
- RIDING STYLE:
- OFF-ROAD
- LENGTH IMPERIAL:
- 4'
- RIDING STYLE:
- ATV
- TYPE:
- MID PIPE INLET SLEEVE INSERT
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- UTV
- STYLE:
- ROUND
$19.99 -
FMF Slip Flange - CRF250R '04-'09 040656
FMF
$29.99A degraded exhaust flange is a silent performance killer—it causes air leaks, reduces scavenging efficiency, and can allow unburned fuel to escape before combustion completes. The FMF Slip Flange restores the critical seal between your header and...18600586- SKU:
- 18600586
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- ATV
- TYPE:
- FLANGE KIT
- PRODUCT NAME:
- KIT
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- UNITS:
- KIT
$29.99Qty in Cart: 0Quantity:Price:$29.99Subtotal: -
FMF Exhaust O-Ring Kit 014815
FMF
$11.99Exhaust seals deteriorate with heat cycling and vibration, causing leaks that compromise performance and create unwanted noise. The FMF Exhaust O-Ring Kit 014815 provides OEM-quality replacement seals and springs to restore a tight, leak-free connection...18600818- SKU:
- 18600818
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- O-RING
- TYPE:
- EXHAUST
$11.99 -
FMF Exhaust O-Ring Kit 014814
FMF
$12.99Exhaust leaks compromise performance and create unwanted noise—this FMF O-ring and spring kit delivers a factory-fresh seal for your exhaust system. A properly sealed exhaust ensures optimal back-pressure management and prevents horsepower loss from air...18600700- SKU:
- 18600700
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MATERIAL:
- RUBBER
- TYPE:
- EXHAUST
- PRODUCT NAME:
- O-RING
- MATERIAL:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$12.99Qty in Cart: 0Quantity:Price:$12.99Subtotal: -
FMF End Cap - Titanium 020522
FMF
$74.99If your Powercore 2:1 silencer's end cap is damaged, cracked, or worn, you're losing acoustic tuning and risking internal component exposure. This OEM FMF titanium replacement restores your exhaust system to factory specifications and maintains the...18601954- SKU:
- 18601954
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- END CAP
- UNITS:
- EACH
- TYPE:
- EXHAUST
$74.99Qty in Cart: 0Quantity:Price:$74.99Subtotal: -
FMF End Cap - Stainless Steel 020521
FMF
$59.99Your Powercore 2:1 silencer's end cap takes the brunt of heat cycling and exhaust scavenging—a worn or damaged cone compromises flow efficiency and allows heat to escape where it shouldn't. This genuine FMF stainless steel replacement restores optimal...18601957- SKU:
- 18601957
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- TYPE:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- END CAP
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- OFF-ROAD
$59.99 -
FMF Colorways Logo Kit - Blue 014849
FMF
$17.99Whether you're building a custom bike, refreshing your pit setup, or personalizing your gear collection, the FMF Colorways Logo Kit in Blue gives you authentic factory branding that matches your commitment to quality. FMF's reputation for engineering...18602112- SKU:
- 18602112
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BASE COLOR:
- BLUE
- BASE COLOR:
- YELLOW
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- DECAL
- COLOR/FINISH:
- RED
- GRAPHIC:
- FMF LOGO
- STYLE:
- COLORWAYS 4.1
- TYPE:
- EXHAUST
- UNITS:
- EACH
- COLOR/FINISH:
- BLUE
- COLOR/FINISH:
- YELLOW
- RIDING STYLE:
- OFF-ROAD
$17.99 -
FMF End Cap - Stainless Steel - Powercore 4/Q4 040676
FMF
$49.99A worn or damaged end cap compromises your exhaust system's structural integrity and aerodynamic efficiency. This FMF stainless steel replacement restores full performance and durability to your Powercore 4 or Q4 silencer. Direct bolt-on installation...18601049- SKU:
- 18601049
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- PRODUCT NAME:
- CAP
- END CAP STYLE:
- SLASH-CUT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- TI POWERCORE 4
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- STYLE:
- ROUND
- TYPE:
- END CAP
$49.99 -
FMF 4.1 RCT Spark Arrestor Insert 040681
FMF
$39.99The FMF 4.1 RCT Spark Arrestor Insert keeps your exhaust system compliant with track and trail regulations while maintaining the performance characteristics of your Factory 4.1 silencer. This direct-fit insert eliminates spark ejection without...18601372- SKU:
- 18601372
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MODEL:
- FACTORY 4.1 RCT
- TYPE:
- SPARK ARRESTOR
- UNITS:
- EACH
- PRODUCT NAME:
- INSERT
- RIDING STYLE:
- OFF-ROAD
$39.99Qty in Cart: 0Quantity:Price:$39.99Subtotal: -
FMF Long Strap - without O-Rings - PCore 4 040198
FMF
$16.99Exhaust vibration and movement can compromise system integrity, accelerate component wear, and transmit unwanted noise into the cabin. The FMF Long Strap replacement mount isolates your exhaust system with precision engineering, restoring proper support...FMF040198- SKU:
- FMF040198
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MODEL:
- POWERCORE 4
- MATERIAL:
- RUBBER
- MODEL:
- TI POWERCORE 4
- PRODUCT NAME:
- STRAP
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- MOUNTING STRAP
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- UTV
- SIZE:
- LONG
$16.99 -
FMF Medium Strap - without O-Rings - PCore 4 040197
FMF
$16.99Exhaust vibration and movement can compromise both performance and durability, leading to cracks, leaks, and accelerated wear on your exhaust system. The FMF Medium Strap provides robust support and isolation, keeping your exhaust properly secured while...FMF040197- SKU:
- FMF040197
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- RUBBER
- MODEL:
- TI POWERCORE 4
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- MOUNTING STRAP
- MODEL:
- POWERCORE 4
- RIDING STYLE:
- ATV
- MATERIAL:
- STAINLESS STEEL
- SIZE:
- MEDIUM
- UNITS:
- EACH
- PRODUCT NAME:
- STRAP
- RIDING STYLE:
- UTV
$16.99Qty in Cart: 0Quantity:Price:$16.99Subtotal: -
FMF Short Strap - without O-Rings - PCore 4 040196
FMF
$16.99Exhaust vibration and movement can compromise your system's integrity and create unwanted noise under acceleration. The FMF Short Strap provides reliable mounting support to keep your exhaust secured and isolated from the chassis, preventing resonance...FMF040196- SKU:
- FMF040196
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- ATV
- SIZE:
- SHORT
- UNITS:
- EACH
- MATERIAL:
- RUBBER
- MODEL:
- TI POWERCORE 4
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- POWERCORE 4
- TYPE:
- MOUNTING STRAP
- PRODUCT NAME:
- STRAP
$16.99 -
FMF Replacement Springs and Clips for Titanium 4 040186
FMF
$10.99If you're running an FMF Titanium 4 exhaust system, the springs and clips are critical wear items that directly impact system stability and longevity. Over time, vibration and thermal cycling degrade these components, leading to rattling, misalignment,...FMF040186- SKU:
- FMF040186
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- SPRING
- RIDING STYLE:
- UTV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- EXHAUST
$10.99 -
FMF Replacement Rear Cone - 1.375" - Turbinecore 2 020465
FMF
$39.99FMF silencers deliver proven performance, but wear on your rear cone compromises both sound character and flow efficiency. This OEM replacement cone restores your Turbinecore 2 silencer to factory specifications, ensuring consistent exhaust scavenging...FMF020465- SKU:
- FMF020465
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- END CAP
- UNITS:
- EACH
- BASE FINISH:
- NATURAL
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- UTV
- COLOR/FINISH:
- STAINLESS STEEL
- OUTLET DIAMETER IMPERIAL:
- 1.375'
- END CAP STYLE:
- CONICAL
- MODEL:
- TURBINECORE 2
- PRODUCT NAME:
- CAP
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$39.99 -
FMF Replacement Rear Cone - 1.0" - Powercore 2 020461
FMF
$39.99FMF replacement rear cones are essential wear items for maintaining optimal exhaust flow and sound characteristics in your Powercore 2 silencer. A deteriorated or damaged cone compromises backpressure tuning and can degrade your bike's performance across...FMF020461- SKU:
- FMF020461
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BASE FINISH:
- NATURAL
- COLOR/FINISH:
- STAINLESS STEEL
- END CAP STYLE:
- CONICAL
- PRODUCT NAME:
- CAP
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- STAINLESS STEEL
- MODEL:
- POWERCORE 2
- OUTLET DIAMETER IMPERIAL:
- 1'
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- UTV
- TYPE:
- END CAP
$39.99 -
WSM Sea-Doo Exhaust Hose 011-425
WSM
$17.65A compromised exhaust hose directly impacts engine performance, reliability, and safety on the water. The WSM Sea-Doo Exhaust Hose 011-425 is engineered to withstand extreme temperatures and high-velocity exhaust flow, ensuring optimal scavenging and...18600539- SKU:
- 18600539
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- EXHAUST
- UNITS:
- EACH
- LENGTH IMPERIAL:
- 3.2'
- PRODUCT NAME:
- HOSE
$17.65Qty in Cart: 0Quantity:Price:$17.65Subtotal: -
FMF 2-Stroke Packing 010589
FMF
$10.99Exhaust silencer performance degrades as factory packing material breaks down over time, resulting in increased noise and reduced scavenging efficiency. The FMF 2-Stroke Packing 010589 restores your silencer to OEM specifications using genuine...FMF12002- SKU:
- FMF12002
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- FIBERGLASS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- COLOR/FINISH:
- WHITE
- PRODUCT NAME:
- MUFFLER PACKING
- RIDING STYLE:
- ATV
- STYLE:
- 2-STROKE
- UNITS:
- EACH
$10.99
