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!
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FMF Quiet Core Insert - 4.1 RCT 040689
FMF
$39.99If you're running FMF's 4.1 RCT exhaust system but need to dial in the noise levels for track regulations or street legality, the Quiet Core Insert is your direct solution. This replacement core reduces sound output without sacrificing the scavenging...18611666- SKU:
- 18611666
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
$39.99 -
HELIX Exhaust Springs - Zinc - 57 mm - 10-Pack 495-5710
HELIX
$33.95Exhaust manifold leaks and loose heat shielding can severely compromise engine performance and create dangerous underhood conditions. The HELIX Exhaust Springs deliver consistent clamping force to keep your exhaust system sealed and vibration-free,...18602373- SKU:
- 18602373
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$33.95 -
HELIX Exhaust Springs - Zinc - 60 mm 495-6002
HELIX
$7.95Exhaust springs are a critical component for maintaining proper manifold alignment and preventing heat-related warping. The HELIX 60 mm Exhaust Springs provide reliable support and vibration isolation, protecting your exhaust system from stress fractures...18602374- SKU:
- 18602374
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$7.95 -
HELIX Exhaust Springs - Zinc - 60 mm - 10-Pack 495-6010
HELIX
$33.95Exhaust springs are critical for maintaining secure, vibration-resistant connections in high-temperature exhaust systems. HELIX Exhaust Springs provide reliable hold-down force that prevents thermal cycling damage and unwanted movement, ensuring your...18602375- SKU:
- 18602375
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$33.95 -
HELIX Exhaust Springs - Zinc - 63 mm 495-6302
HELIX
$7.95Exhaust springs are critical fastening components that secure your exhaust system while accommodating thermal expansion and vibration cycles. Quality springs prevent costly rattles, leaks, and component separation under high-heat operating conditions...18602376- SKU:
- 18602376
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
$7.95 -
HELIX Exhaust Springs - Zinc - 63 mm - 10-Pack 495-6310
HELIX
$33.95Exhaust manifold leaks compromise both performance and longevity—HELIX Exhaust Springs provide the secure, vibration-resistant fastening your high-heat exhaust system demands. These zinc-plated springs maintain consistent clamp pressure across thermal...18602377- SKU:
- 18602377
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$33.95 -
HELIX Exhaust Springs - Zinc - 67 mm 495-6702
HELIX
$7.95Exhaust springs are critical fastening components that secure your exhaust system while accommodating thermal expansion and vibration. These HELIX springs maintain consistent clamping force throughout the temperature cycling that occurs during hard...18602378- SKU:
- 18602378
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$7.95 -
HELIX Exhaust Springs - Zinc - 67 mm - 10-Pack 495-6710
HELIX
$33.95Exhaust manifolds and heat shields demand springs that won't fail under thermal cycling and constant vibration. HELIX Exhaust Springs deliver reliable fastening without the brittleness of standard hardware, keeping your exhaust system secure through...18602379- SKU:
- 18602379
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$33.95 -
HELIX Exhaust Springs - Zinc - 70 mm 495-7002
HELIX
$7.95Exhaust springs are critical for maintaining proper header and manifold alignment, preventing vibration-induced cracking and component failure over time. HELIX's zinc-plated steel construction resists corrosion while delivering consistent clamping force...18602380- SKU:
- 18602380
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$7.95 -
HELIX Exhaust Springs - Zinc - 70 mm - 10-Pack 495-7010
HELIX
$33.95Exhaust manifold leaks and loose heat shields waste horsepower and create dangerous underhood temperatures. HELIX Exhaust Springs provide the reliable clamping force needed to secure exhaust components without slipping or degrading under thermal cycling...18602381- SKU:
- 18602381
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
$33.95 -
HELIX Exhaust Springs - Zinc - 75 mm 495-7502
HELIX
$7.95Exhaust springs are critical for maintaining proper manifold and pipe alignment under thermal cycling and vibration stress. HELIX's zinc-plated steel construction resists corrosion while delivering consistent support across engine operation, preventing...18602382- SKU:
- 18602382
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
$7.95 -
HELIX Exhaust Springs - Zinc - 75 mm - 10-Pack 495-7510
HELIX
$33.95Exhaust manifold and header systems require reliable fastening that withstands extreme thermal cycling and vibration. HELIX Exhaust Springs deliver the consistent clamping force needed to keep your exhaust components securely sealed without degradation,...18602383- SKU:
- 18602383
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$33.95 -
HELIX Exhaust Springs - Zinc - 80 mm 495-8002
HELIX
$7.95Exhaust springs are critical for maintaining proper exhaust system geometry and preventing vibration-induced component failure. The HELIX 80 mm zinc-plated springs distribute thermal stress evenly while securing your exhaust manifold or header to the...18602384- SKU:
- 18602384
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$7.95 -
HELIX Exhaust Springs - Zinc - 80 mm - 10-Pack 495-8010
HELIX
$33.95Exhaust manifold heat-cycling and vibration demand springs that won't fatigue or corrode. The HELIX Exhaust Springs deliver reliable fastening for high-temperature applications, with zinc plating that resists rust and corrosion in harsh underbody...18602385- SKU:
- 18602385
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
$33.95 -
HELIX Exhaust Springs - Zinc - 83 mm 495-8302
HELIX
$7.95Exhaust springs are critical for maintaining proper header and manifold positioning under thermal cycling and vibration. These HELIX springs prevent exhaust component separation, reduce resonance noise, and extend the service life of your exhaust system...18602386- SKU:
- 18602386
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$7.95 -
HELIX Exhaust Springs - Zinc - 83 mm - 10-Pack 495-8310
HELIX
$33.95HELIX Exhaust Springs keep your exhaust system components securely fastened while withstanding extreme heat cycles and vibration. Zinc plating provides corrosion resistance in harsh underbody environments, ensuring long-term durability. Whether you're...18602387- SKU:
- 18602387
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$33.95 -
HELIX Exhaust Springs - Zinc - 90 mm - 10-Pack 495-9010
HELIX
$33.95Exhaust manifold heat cycles and vibration demand springs that won't fatigue or corrode—and that's exactly what HELIX Exhaust Springs deliver. Whether you're running a street build or track-focused setup, these zinc-plated springs maintain consistent...18602389- SKU:
- 18602389
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$33.95 -
HELIX Exhaust Springs - Zinc - 95 mm 495-9502
HELIX
$7.95Exhaust springs are critical for maintaining proper clearance and preventing vibration-induced damage to your exhaust system. HELIX Exhaust Springs provide reliable support and damping that keeps your exhaust components stable under engine vibration and...18602390- SKU:
- 18602390
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
$7.95 -
HELIX Exhaust Springs - Zinc - 100 mm - 10-Pack 495-9910
HELIX
$33.95Exhaust springs are critical wear items in any performance exhaust system, and these HELIX zinc-plated springs deliver reliable fastening without corrosion compromise. Whether you're assembling a custom exhaust manifold or replacing worn hardware on a...18602393- SKU:
- 18602393
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$33.95 -
HELIX Exhaust Spring Kit - Zinc 495-1002
HELIX
$128.95Exhaust manifold fasteners are the weak link in most OEM setups—standard bolts loosen under thermal cycling, leading to exhaust leaks, performance loss, and costly repairs. The HELIX Exhaust Spring Kit delivers constant clamping force that moves with...18602394- SKU:
- 18602394
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$128.95
