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
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FMF End Cap - Titanium - Factory 4.1 040637
FMF
$49.99Replacement 4-Stroke Exhaust End Cap18600503- SKU:
- 18600503
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- END CAP
- STYLE:
- REPLACEMENT
- MODEL:
- FACTORY 4.1
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- UTV
- END CAP STYLE:
- CONICAL
- MATERIAL:
- TITANIUM
$49.99Qty in Cart: 0Quantity:Price:$49.99Subtotal: -
FMF RCT End Cap - Titanium 040642
FMF
$59.99Includes end cap, 3/16 stainless steel rivets, and strap mounts to secure end cap to canister18600562- 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
$59.99Qty in Cart: 0Quantity:Price:$59.99Subtotal: -
FMF Muffler Sleeve - Aluminum 040650
FMF
$19.99Replacement sleeves for worn out mid-pipes18600580- 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
$19.99Replacement sleeves for worn out mid-pipes18600584- 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
$29.99Replaces worn-out, damaged or old flange hardware18600586- 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
$11.99Spring and O-ring kit for exhaust pipe18600818- 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
$11.99Qty in Cart: 0Quantity:Price:$11.99Subtotal: -
FMF Exhaust O-Ring Kit 014814
FMF
$12.99Spring and O-ring kit for exhaust pipe18600700- 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
$74.99Replacement cone cap for Powercore 2:1 Silencer18601954- 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
$74.99 -
FMF End Cap - Stainless Steel 020521
FMF
$59.99Replacement cone cap for Powercore 2:1 Silencer18601957- 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
$59.99Qty in Cart: 0Quantity:Price:$59.99Subtotal: -
FMF Colorways Logo Kit - Blue 014849
FMF
$17.99FMF Colorways Logo Kit - Blue18602112- 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
$17.99Qty in Cart: 0Quantity:Price:$17.99Subtotal: -
FMF End Cap - Stainless Steel - Powercore 4/Q4 040676
FMF
$49.99Replacement rear cone cap18601049- 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
$49.99Qty in Cart: 0Quantity:Price:$49.99Subtotal: -
FMF 4.1 RCT Spark Arrestor Insert 040681
FMF
$39.99For use with Factory 4.118601372- 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
$16.99Replacement exhaust mounts, Not for minisFMF040198- 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
$16.99Qty in Cart: 0Quantity:Price:$16.99Subtotal: -
FMF Medium Strap - without O-Rings - PCore 4 040197
FMF
$16.99Replacement exhaust mounts, Not for minisFMF040197- 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
$16.99Replacement exhaust mounts, Not for minisFMF040196- 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
$16.99Qty in Cart: 0Quantity:Price:$16.99Subtotal: -
FMF Replacement Springs and Clips for Titanium 4 040186
FMF
$10.99Spring and clip replacement for FMF Titanium 4 SystemsFMF040186- 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
$10.99Qty in Cart: 0Quantity:Price:$10.99Subtotal: -
FMF Replacement Rear Cone - 1.375" - Turbinecore 2 020465
FMF
$39.99Replacement caps for FMF silencersFMF020465- 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
$39.99Replacement caps for FMF silencersFMF020461- 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
$39.99Qty in Cart: 0Quantity:Price:$39.99Subtotal: -
WSM Sea-Doo Exhaust Hose 011-425
WSM
$17.65Exhaust pipe hose18600539- 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
$10.99Owens-Corning fiberglass replacement packing keeps silencers performing as they're meant toFMF12002- 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
$10.99Qty in Cart: 0Quantity:Price:$10.99Subtotal:
