Harley Engine Gaskets and Kits
Harley Bike Gaskets & Kits at JJ Motorsports
Rebuild your Harley with premium gasket kits and seals from JJ Motorsports, featuring complete top-end, motor, and cam-install kits for leak-free performance on Milwaukee-Eight, Twin Cam, Evo, and Big Twin engines. These high-quality MLS, rubber, and metal gaskets ensure perfect sealing and long-term reliability.
Shop Feuling, Cometic, and James Gasket for proven sealing solutions. Explore related categories such as Harley engine for cams and lifters, or Harley for oil pumps and heads to complete your rebuild.
Top Harley Gaskets & Kits
- Feuling Top-End Cam Install Kit M8 2030 – Complete top-end gasket kit for Milwaukee-Eight; includes head, base, rocker, and pushrod seals.
- Cometic Complete Gasket Kit C9748F – Full engine gasket set with MLS head gaskets; fits Twin Cam 88/96/103 engines.
- James Gasket Motor Gasket Metal Base Rocker 17041-92-A – Metal rocker box base gasket set; OEM-style for Evo and Twin Cam rocker boxes.
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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JAMES GASKET Top End Gasket Kit - 88" 17054-99
JAMES GASKET
$125.95A complete top-end gasket rebuild requires precision components that seal under extreme pressure and temperature cycles—inferior gaskets lead to oil leaks, combustion blow-by, and compromised engine integrity. JAMES GASKET's 88" Top End Gasket Kit...20112101- SKU:
- 20112101
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- THICKNESS IMPERIAL:
- 0,036'
- THICKNESS METRIC:
- 0.91 MM
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$125.95 -
JAMES GASKET Top End Gasket Kit - 95" 17054-99-X
JAMES GASKET
$125.95A complete top-end gasket kit is essential for any 95" engine rebuild—it ensures a proper seal across all critical combustion chamber surfaces and prevents oil leakage that compromises performance and reliability. JAMES GASKET delivers OEM-quality...20112100- SKU:
- 20112100
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.875'
- THICKNESS IMPERIAL:
- 0,036'
- THICKNESS METRIC:
- 0.91 MM
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$125.95 -
JAMES GASKET Motor Gasket Kit - 95" 17055-99-X
JAMES GASKET
$130.95A complete engine rebuild demands precision sealing—any compromise on gaskets, oil seals, or O-rings will cost you reliability and performance. The JAMES GASKET Motor Gasket Kit delivers all the critical sealing components your 95" Panhead needs in one...20112099- SKU:
- 20112099
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- TYPE:
- COMPLETE
- TYPE:
- MOTOR
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,036'
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 0.91 MM
$130.95 -
COMETIC Transmission Top Cover Gasket C9267F
COMETIC
$18.60A transmission top cover gasket is critical to preventing fluid leakage and maintaining system integrity under pressure and heat cycles. The COMETIC C9267F eliminates the guesswork with a proven Aluminum Foamette design that seals reliably without...09350220- SKU:
- 09350220
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- STREET
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- TYPE:
- TRANSMISSION TOP COVER
$18.60 -
COMETIC Oil Pan Gasket - AFM 10 C9490F
COMETIC
$33.70An oil pan gasket failure will leave you stranded and cost you thousands in engine damage. The COMETIC AFM 10 C9490F eliminates guesswork with a precision-engineered gasket that seals reliably across temperature cycles and high-pressure conditions. No...09350217- SKU:
- 09350217
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.032'
- TYPE:
- TRANSMISSION
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- TYPE:
- OIL PAN
- UNITS:
- 10 PACK
$33.70 -
COMETIC Solenoid Mount Foam Gasket C9702
COMETIC
$6.30The COMETIC Solenoid Mount Foam Gasket C9702 eliminates guesswork from critical seal points by combining durability with ease of installation—no gasket sealer required. Its aluminum core and chemically bonded nitrile rubber coating create a dependable...09350183- SKU:
- 09350183
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- MATERIAL:
- FOAM
- THICKNESS IMPERIAL:
- 0.019'
- TYPE:
- STARTER
- THICKNESS:
- 0,019'
- RIDING STYLE:
- STREET
- TYPE:
- SOLENOID
$6.30 -
JAMES GASKET Inspection Cover Gasket - XL 34986-04
JAMES GASKET
$9.10Inspection cover gaskets are critical sealing components that prevent oil seepage and contamination at your engine's inspection points. A failing gasket compromises engine cleanliness and can lead to costly oil loss over time. The JAMES GASKET Inspection...09350109- SKU:
- 09350109
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- MATERIAL:
- RUBBER
- TYPE:
- INSPECTION COVER
- UNITS:
- 5 PACK
$9.10 -
JAMES GASKET Speedo Gear Seal 67096-87
JAMES GASKET
$10.95A leaking speedometer drive gear seal doesn't just compromise your instrument accuracy—it allows fluid to seep into your gauge cluster and can lead to costly electrical damage. The JAMES GASKET Speedo Gear Seal 67096-87 is an OEM-specification...09346502- SKU:
- 09346502
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- SEAL
- UNITS:
- 10 PACK
- TYPE:
- SPEEDOMETER DRIVE
- RIDING STYLE:
- STREET
$10.95 -
JAMES GASKET Exhaust Gasket 65927-00
JAMES GASKET
$13.95A properly sealed exhaust manifold is critical to maintaining peak engine performance and preventing costly exhaust leaks that compromise horsepower and fuel efficiency. The JAMES GASKET Exhaust Gasket 65927-00 delivers dependable sealing in...09346501- SKU:
- 09346501
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- UNITS:
- 2 PACK
$13.95 -
JAMES GASKET Exhaust Gasket 65324-83-CG-2
JAMES GASKET
$8.95A quality exhaust gasket is critical to maintaining proper combustion chamber sealing and preventing exhaust leaks that rob power and increase emissions. The JAMES GASKET 65324-83-CG-2 delivers OEM-grade reliability with domestic manufacturing standards,...09346498- SKU:
- 09346498
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
$8.95 -
JAMES GASKET Exhaust Gasket 65324-83-2
JAMES GASKET
$12.95A properly sealed exhaust gasket is critical for maintaining system integrity and preventing exhaust leaks that rob horsepower and increase emissions. The JAMES GASKET Exhaust Gasket 65324-83-2 delivers OEM-quality sealing with U.S.-made durability,...09346497- SKU:
- 09346497
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
$12.95 -
COMETIC Complete Engine/Primary Gasket Set C10271
COMETIC
$340.15A complete gasket set is the foundation of engine reliability—without proper sealing, you're risking compression loss, coolant leaks, and catastrophic failure. The COMETIC C10271 delivers race-proven sealing across your entire engine and primary...09346332- SKU:
- 09346332
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- BORE SIZE:
- 4,075'
- TYPE:
- COMPLETE
$340.15Qty in Cart: 0Quantity:Price:$340.15Subtotal: -
COMETIC Complete Engine/Primary Gasket Set C10266
COMETIC
$340.15A complete engine gasket set is foundational to maintaining compression integrity and preventing fluid leakage across critical engine surfaces. The COMETIC C10266 delivers multi-layer steel head gaskets and premium Viton sealing materials that handle...09346330- SKU:
- 09346330
- Availability:
- Ships Same Business Day
- Weight:
- 1.86 LBS
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- BORE SIZE:
- 4,250'
- PRODUCT NAME:
- GASKET
$340.15 -
COMETIC Complete Engine/Primary Gasket Set C10260
COMETIC
$330.70A complete gasket set is non-negotiable for any engine rebuild or head work—it's your seal against compression loss, coolant leaks, and oil seepage that can compromise performance and reliability. COMETIC's C10260 pairs OEM-grade multi-layer steel head...09346329- SKU:
- 09346329
- Availability:
- Ships Same Business Day
- Weight:
- 1.91 LBS
- TYPE:
- COMPLETE
- UNITS:
- KIT
- BORE SIZE:
- 3,937'
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
$330.70 -
COMETIC Primary Gasket C10241F5
COMETIC
$120.50A quality primary gasket is foundational to engine reliability—poor sealing leads to oil leaks, pressure loss, and catastrophic failures that sideline your build. The COMETIC Primary Gasket C10241F5 is engineered to maintain a pressure-tight seal across...09346321- SKU:
- 09346321
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- THICKNESS METRIC:
- 0.81 MM
- MOUNTING POSITION:
- OUTER
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.032'
- TYPE:
- PRIMARY
$120.50Qty in Cart: 0Quantity:Price:$120.50Subtotal: -
COMETIC Base Gasket C10242
COMETIC
$33.55A head gasket failure can sideline your engine and drain your wallet. The COMETIC Base Gasket C10242 uses advanced multi-layer steel (MLS) construction with load control embossments to maintain consistent clamping force across the sealing surface,...09346319- SKU:
- 09346319
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER BASE
- UNITS:
- KIT
$33.55 -
COMETIC Intake/Manifold Gasket - M8 C10247
COMETIC
$41.95A compromised intake gasket leads to vacuum leaks, rough idle, and performance loss—problems that compound quickly in high-output engines. The COMETIC C10247 delivers the durability and reliability that professionals depend on, engineered to handle...09346317- SKU:
- 09346317
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- INTAKE MANIFOLD
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
COMETIC Lower Rocker Box Gaskets C10183
COMETIC
$27.25Rocker box gaskets are critical sealing components that prevent oil leakage and maintain proper engine lubrication under high RPM conditions. COMETIC's Viton gaskets deliver superior temperature resistance and durability compared to stock alternatives,...09345950- SKU:
- 09345950
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- UNITS:
- 2 PACK
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- MATERIAL:
- RUBBER
- MOUNTING POSITION:
- LOWER
$27.25Qty in Cart: 0Quantity:Price:$27.25Subtotal: -
COMETIC Cylinder Head Gasket C10182
COMETIC
$61.90A quality cylinder head gasket is non-negotiable for maintaining compression and preventing coolant leakage under extreme operating conditions. The COMETIC C10182 delivers the durability and precision fit demanded by high-performance engines, whether...09345948- SKU:
- 09345948
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- BORE SIZE:
- 4,320'
- BORE SIZE IMPERIAL:
- 4.320'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- LAYERED STEEL
- UNITS:
- 2 PACK
- THICKNESS IMPERIAL:
- 0,040'
- TYPE:
- CYLINDER HEAD
- THICKNESS METRIC:
- 1.02 MM
$61.90 -
COMETIC Cylinder Head/Base Gasket C10181HB030020
COMETIC
$78.70A cylinder head gasket is your engine's first line of defense against combustion pressure, coolant crossover, and oil leakage—failure here means catastrophic engine damage. The COMETIC C10181HB030020 uses Multi-Layer Steel (MLS) construction to maintain...09345947- SKU:
- 09345947
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- THICKNESS:
- 0,76 MM (0,030')
- BORE SIZE:
- 4,250'
- BORE SIZE IMPERIAL:
- 4.250'
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.51 MM
- THICKNESS METRIC:
- 0.76 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- CYLINDER BASE
- TYPE:
- CYLINDER HEAD
- UNITS:
- KIT
$78.70
Buying Guide and FAQs
Buying Guide: Factors to Consider When Choosing Harley Bike Engine Gaskets and Kits
- Compatibility: Ensure the kit fits your Harley's engine type (e.g., Milwaukee-Eight M8, Twin Cam 88/96/103, Evo, Big Twin) and model (e.g., FLHR Road King 1984-1998, FLST Heritage Softail 2006). Use the vehicle selector for year-specific matches, including bore sizes and applications to avoid sealing issues.
- Type of Use: For cam changes or top-end rebuilds, select install kits with ARP bolts; complete gasket sets suit full engine overhauls for leak-free performance in touring or street riding.
- Components and Upgrades: Choose kits with MLS head gaskets, Viton seals, AFM exhaust gaskets, ARP hardware, and O-rings. Focus on high-tech materials for heat dissipation, corrosion resistance, and reliable sealing.
- Brand and Quality: Opt for Feuling for cam install kits with Koyo bearings, Cometic for EST gasket sets with embossed steel, James Gasket for rocker/base gaskets, Vance & Hines for exhaust ports, or Drag Specialties for transmission boards. Prioritize USA-made quality for durability in extreme conditions.
- Installation and Cost: Kits are designed for DIY or professional rebuilds with included components like moly paste and Loctite. Prices range from $16.95 for exhaust gaskets to $356.95 for complete sets—factor in bore sizes and free shipping over $99 for value.
Frequently Asked Questions (FAQs)
- What Harley models and engines do these gaskets and kits support? Kits support Big Twin, Twin Cam, Evo, M8, and models like Road King, Heritage Softail—use the year/make/model filter for compatibility, including bore sizes like 3.500" to 3.8125".
- How do high-tech materials improve sealing? Materials like MLS steel, Viton-coated, and AFM provide even heat dissipation, corrosion resistance, and leak-free performance for rebuilds.
- What is typically included in a cam install kit? Feuling kits include seals, bearings, ARP bolts, moly paste, Loctite, washers, and copper gaskets for complete cam changes.
- Are these kits suitable for top-end rebuilds? Yes, Cometic and James Gasket kits focus on top-end with head/base/rocker gaskets for reliable overhauls.
- What if a kit doesn't fit my Harley? Verify engine type, bore size, and model before buying. Our returns policy allows exchanges or refunds if it doesn't match.
- Can I find related engine parts? Yes—explore pistons/rings, cylinders/heads, bearings/seals, or full rebuild kits in the Harley engine category to complete your gasket upgrade.
