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
-
HELIX Exhaust Springs - Zinc - 95 mm - 10-Pack 495-9510
HELIX
$33.95Exhaust manifolds and heat shields require reliable fastening that can withstand thermal cycling and vibration without degradation. HELIX Exhaust Springs deliver consistent clamping force across repeated heat cycles, eliminating the need for constant...18602391- SKU:
- 18602391
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$33.95 -
HELIX Exhaust Springs - Zinc - 100 mm - 2-Pack 495-9902
HELIX
$7.95Exhaust springs are critical for maintaining secure, vibration-resistant connections in your exhaust system—especially under thermal cycling and engine vibration. These HELIX Exhaust Springs deliver reliable support with zinc-plated corrosion resistance,...18602392- SKU:
- 18602392
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
$7.95 -
HELIX Exhaust Springs - Zinc - 57 mm 495-5702
HELIX
$7.95Exhaust heat and vibration will degrade standard fasteners and cause costly leaks over time. HELIX Exhaust Springs provide the durability and reliability needed to keep your exhaust system secure through extreme temperatures and engine vibration. These...18602372- SKU:
- 18602372
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$7.95 -
FMF Exhaust O-Rings 014880
FMF
$9.99Exhaust system leaks compromise performance and create unwanted noise that undermines your build. FMF Exhaust O-Rings provide a reliable seal at critical connection points, ensuring your exhaust system maintains peak efficiency and longevity. Whether...18602396- SKU:
- 18602396
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$9.99 -
FMF Exhaust O-Rings 014881
FMF
$9.99Exhaust O-rings are critical wear items that prevent gas leakage at connection points, maintaining proper backpressure and engine efficiency. FMF's 014881 O-rings are precision-engineered to OEM specifications, ensuring a reliable seal across their full...18602397- SKU:
- 18602397
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$9.99Qty in Cart: 0Quantity:Price:$9.99Subtotal: -
FMF Exhaust O-Rings 014882
FMF
$9.99Exhaust leaks compromise performance, efficiency, and sound quality—and worn O-rings are often the culprit. FMF Exhaust O-Rings (014882) provide a precision seal at critical connection points, preventing exhaust bypass and maintaining backpressure for...18602398- SKU:
- 18602398
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$9.99Qty in Cart: 0Quantity:Price:$9.99Subtotal: -
FMF Exhaust O-Rings 014883
FMF
$9.99Exhaust leaks compromise performance and create unwanted noise—FMF Exhaust O-Rings 014883 restore the critical seal your system needs to function at peak efficiency. These replacement seals are engineered to handle extreme combustion temperatures and...18602399- SKU:
- 18602399
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$9.99 -
FMF Exhaust O-Rings 014884
FMF
$9.99FMF exhaust o-rings are critical sealing components that prevent exhaust gas leaks at connection points, ensuring optimal scavenging and peak engine performance. A degraded or missing o-ring compromises system integrity and reduces the reliability of...18602400- SKU:
- 18602400
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$9.99 -
FMF Exhaust O-Rings 014885
FMF
$9.99Exhaust system integrity depends on reliable sealing at every connection point—degraded or missing o-rings compromise performance and allow unmetered air infiltration that throws off your tune. FMF Exhaust O-Rings are engineered to withstand the extreme...18602401- SKU:
- 18602401
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$9.99 -
FMF Exhaust O-Rings 014886
FMF
$9.99FMF exhaust O-rings are critical wear items that prevent exhaust gas leaks and maintain system integrity under high-temperature cycling. These seals are engineered to withstand repeated thermal stress, ensuring your exhaust system performs reliably...18602402- SKU:
- 18602402
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$9.99 -
FMF Exhaust O-Rings 014889
FMF
$9.99FMF exhaust O-rings are critical sealing components that prevent exhaust leaks at connection points, maintaining back-pressure and system efficiency. Over time, O-rings degrade from heat cycling and thermal stress, compromising your exhaust system's...18602405- SKU:
- 18602405
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$9.99 -
On Sale
FMF Exhaust O-Rings 014893
FMF
MSRP: $9.99Now: $8.00Was: $9.99A leaking exhaust system undermines performance and creates safety hazards. FMF Exhaust O-Rings maintain a perfect seal at critical connection points, preventing exhaust gas leakage and ensuring your system operates at peak efficiency. These OEM-quality...18602409- SKU:
- 18602409
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
MSRP: $9.99Now: $8.00Was: $9.99 -
On Sale
FMF Exhaust O-Rings 014894
FMF
MSRP: $9.99Now: $8.00Was: $9.99Exhaust O-ring seals deteriorate over time due to heat cycling and vibration, leading to exhaust leaks that compromise performance and create unwanted noise. FMF Exhaust O-Rings 014894 are direct replacements engineered to withstand extreme temperatures...18602410- SKU:
- 18602410
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
MSRP: $9.99Now: $8.00Was: $9.99 -
On Sale
FMF Exhaust O-Rings 014895
FMF
MSRP: $9.99Now: $8.00Was: $9.99Exhaust O-ring degradation is one of the most common culprits behind exhaust leaks and performance loss in high-performance systems. FMF Exhaust O-Rings (MPN: 014895) provide a critical seal at connection points, preventing unmetered air intrusion that...18602411- SKU:
- 18602411
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
MSRP: $9.99Now: $8.00Was: $9.99 -
On Sale
FMF Exhaust O-Rings 014890
FMF
MSRP: $9.99Now: $8.00Was: $9.99Exhaust leaks compromise performance and create costly engine damage—a quality seal is non-negotiable. FMF Exhaust O-Rings 014890 deliver a reliable, temperature-resistant seal that prevents bypass and maintains optimal exhaust scavenging. Replace worn...18602406- SKU:
- 18602406
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
MSRP: $9.99Now: $8.00Was: $9.99 -
Pro Circuit Exhaust Flange for Honda CR250R 2003-2004 141001
PRO CIRCUIT
$39.95A properly sealed exhaust flange is critical to maximizing scavenging efficiency and preventing boost leak on your CR250R—even small gaps can rob you of measurable horsepower. The Pro Circuit Exhaust Flange for 2003-2004 Honda CR250R delivers a precision...18602416- SKU:
- 18602416
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
$39.95 -
BOLT Exhaust Pipe Spring - 12 mm x 85 mm - 4-Pack 023-20285
BOLT
$13.00Exhaust pipe springs are critical fastening components that secure exhaust systems while allowing thermal expansion and vibration absorption—essential for maintaining system integrity under high-temperature cycling. These BOLT springs provide reliable...18602455- SKU:
- 18602455
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
$13.00 -
BOLT Exhaust Pipe Spring - 9 mm x 87 mm - 4-Pack 023-20287
BOLT
$10.50Exhaust pipe springs are critical fastening components that secure exhaust systems under thermal stress and vibration. These springs maintain proper exhaust alignment while accommodating engine movement, preventing rattles, leaks, and premature component...18602456- SKU:
- 18602456
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
$10.50 -
BOLT Exhaust Hardware Kit BET.EX.2T13
BOLT
$26.99A quality exhaust system is only as reliable as its fastening components. This hardware kit eliminates common failure points—loose couplers, slipped silencers, and degraded seals—that can compromise both performance and longevity. Whether you're running...18602457- SKU:
- 18602457
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
$26.99 -
BOLT Exhaust Pipe Spring - 80 mm - 4-Pack 023-20280
BOLT
$13.00Exhaust pipe springs are critical for maintaining proper exhaust system alignment and preventing resonance vibration that can compromise performance and durability. These 80 mm springs isolate your exhaust from the chassis, reducing fatigue stress on...18602454- SKU:
- 18602454
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
$13.00
