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
-
COMETIC Cylinder Head/Base Gasket C10192-HB
COMETIC
$81.85A reliable cylinder head gasket is fundamental to maintaining combustion chamber seal integrity and preventing coolant or oil seepage that compromises engine performance. The COMETIC C10192-HB delivers the durability and precision fit demanded by serious...09345954- SKU:
- 09345954
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,014'
- BORE SIZE:
- 4,320'
- BORE SIZE IMPERIAL:
- 4.320'
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,36 MM (0,014')
- THICKNESS:
- 1,02 MM (0,040')
- THICKNESS METRIC:
- 0.36 MM
- TYPE:
- CYLINDER BASE
- TYPE:
- CYLINDER HEAD
- UNITS:
- KIT
$81.85 -
COMETIC Trans End Gasket C9483F
COMETIC
$19.90A leaking transmission end gasket compromises both performance and reliability, leading to fluid loss and potential internal damage. The COMETIC Trans End Gasket C9483F delivers a superior seal without requiring gasket sealer, thanks to its aluminum...09341385- SKU:
- 09341385
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- THICKNESS:
- 0,81 MM (0,032')
- UNITS:
- 10 PACK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,032'
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CLUTCH RELEASE
- TYPE:
- END COVER
$19.90 -
COMETIC Oil Gasket C9489F
COMETIC
$9.50Oil leaks compromise both engine performance and your shop floor—the COMETIC C9489F eliminates this problem with a robust aluminum-core gasket that won't degrade under sustained heat and pressure. Unlike conventional gaskets, this design bonds a...09341386- SKU:
- 09341386
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- OIL FILLER
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- UNITS:
- 10 PACK
$9.50 -
COMETIC Bearing Housing Gasket C9644F
COMETIC
$20.60Bearing housing gaskets are critical sealing components that prevent oil leakage and maintain pressure integrity in high-performance engines. The COMETIC C9644F uses Aluminum Foamette construction to deliver superior sealing performance without requiring...09341390- SKU:
- 09341390
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- TRANSMISSION
- TYPE:
- BEARING HOUSING
- UNITS:
- 10 PACK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
$20.60 -
COMETIC Inner Rocker Gasket C9197
COMETIC
$5.20Inner rocker gaskets are critical sealing components that prevent oil leakage at the rocker cover interface—a common failure point in high-revving engines. The COMETIC C9197 combines a stainless steel core with Viton rubber facing to deliver superior...09341396- SKU:
- 09341396
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MOUNTING POSITION:
- INNER
- MATERIAL:
- SILICONE
- PRODUCT NAME:
- GASKET
- TYPE:
- ROCKER COVER
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
$5.20 -
COMETIC Lower Rocker Cover Rubber Gasket C9014
COMETIC
$26.90A quality rocker cover gasket is critical to preventing oil leaks that can compromise engine cleanliness and performance. The COMETIC C9014 combines proven Viton elastomer technology with a stainless steel core to deliver reliable sealing across...09341399- SKU:
- 09341399
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- MOUNTING POSITION:
- LOWER
- MATERIAL:
- VITON
- TYPE:
- ROCKER COVER
$26.90Qty in Cart: 0Quantity:Price:$26.90Subtotal: -
On Sale
COMETIC Upper Rocker Cover Rubber Gasket C9010
COMETIC
Now: $25.00Was: $26.90A leaking rocker cover gasket compromises engine sealing and invites oil contamination into your combustion chamber. The COMETIC Upper Rocker Cover Rubber Gasket C9010 delivers reliable, long-term sealing with a proven Viton compound that resists oil...09341400- SKU:
- 09341400
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- MATERIAL:
- VITON
- MOUNTING POSITION:
- UPPER
- TYPE:
- ROCKER COVER
Now: $25.00Was: $26.90Qty in Cart: 0Quantity:Price:Now: $25.00Was: $26.90Subtotal: -
On Sale
COMETIC Rocker Cover Rubber Gasket C9276
COMETIC
Now: $19.00Was: $20.10A quality rocker cover gasket is critical to preventing oil seepage that can compromise engine cleanliness and performance. The COMETIC C9276 combines a stainless steel core with a precision Viton rubber coating to deliver reliable sealing across thermal...09341401- SKU:
- 09341401
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- MATERIAL:
- VITON
- MOUNTING POSITION:
- UPPER
- TYPE:
- ROCKER COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
Now: $19.00Was: $20.10 -
On Sale
COMETIC Trans Gasket - FXD C9151
COMETIC
MSRP: $75.55Now: $71.00Was: $75.55Transmission gasket failure compromises your driveline's integrity and leads to costly fluid leaks and contamination. The COMETIC Trans Gasket C9151 delivers application-specific engineering with premium materials designed to maintain a reliable seal...09341211- SKU:
- 09341211
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
MSRP: $75.55Now: $71.00Was: $75.55 -
On Sale
COMETIC Head Gasket - .051" - MLS Standard C9157
COMETIC
MSRP: $61.90Now: $58.00Was: $61.90A head gasket failure can sideline your engine and drain your wallet—this COMETIC MLS gasket eliminates that risk with proven multi-layer steel construction that handles high boost pressures, varying surface finishes, and extreme combustion temperatures...09341213- SKU:
- 09341213
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- BORE SIZE:
- 3,750'
- MATERIAL:
- LAYERED STEEL
- BORE SIZE IMPERIAL:
- 3.750'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,051'
- TYPE:
- CYLINDER HEAD
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.29 MM
- UNITS:
- PAIR
- MATERIAL:
- VITON
- THICKNESS:
- 1,29 MM (0,051')
MSRP: $61.90Now: $58.00Was: $61.90 -
On Sale
COMETIC Trans Bearing Gasket - Twin Cam C9187
COMETIC
Now: $19.00Was: $20.60Transmission bearing gaskets are critical sealing components that prevent fluid leakage and maintain pressure integrity in your drivetrain. A failed or degraded gasket compromises transmission performance and creates costly fluid loss. The COMETIC Trans...09341232- SKU:
- 09341232
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- BEARING HOUSING
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- UNITS:
- 10 PACK
Now: $19.00Was: $20.60 -
On Sale
COMETIC Complete Gasket Kit - FLT/FXR - 5 Speed C9750F
COMETIC
MSRP: $356.95Now: $336.00Was: $356.95A complete gasket failure can sideline your bike and drain your wallet. COMETIC's FLT/FXR kit eliminates guesswork by providing factory-engineered gaskets for every critical seal—head, base, valve stems, and exhaust—so you can rebuild with confidence and...09340729- SKU:
- 09340729
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,500'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
MSRP: $356.95Now: $336.00Was: $356.95 -
On Sale
COMETIC Complete Gasket Kit - ST/FXD C9777F
COMETIC
MSRP: $287.65Now: $270.00Was: $287.65A complete gasket failure can sideline your engine and cost you races or valuable track time. The COMETIC Complete Gasket Kit C9777F eliminates guesswork by providing every critical gasket you need—head, valve stem, exhaust, and covers—all engineered to...09340731- SKU:
- 09340731
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE:
- STANDARD
- BORE SIZE IMPERIAL:
- STANDARD
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- UNITS:
- KIT
MSRP: $287.65Now: $270.00Was: $287.65 -
On Sale
COMETIC Motor Gasket Kit - XL C9952
COMETIC
MSRP: $202.60Now: $190.00Was: $202.60A complete gasket kit is non-negotiable for any serious engine rebuild or performance upgrade. COMETIC's XL C9952 kit delivers OEM-quality sealing across your entire engine using purpose-built materials for each application—eliminating the guesswork of...09340736- SKU:
- 09340736
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.500'
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- UNITS:
- KIT
- BORE SIZE:
- 3,500'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
MSRP: $202.60Now: $190.00Was: $202.60Qty in Cart: 0Quantity:Price:MSRP: $202.60Now: $190.00Was: $202.60Subtotal: -
On Sale
COMETIC Top End Gasket - 3-3/4" - Big Twin C9771
COMETIC
MSRP: $142.75Now: $134.00Was: $142.75Top-end gasket failure can sideline your engine when you need it most. The COMETIC C9771 uses Extreme Sealing Technology (EST) to eliminate hot spots that typically cause premature gasket breakdown, while its embossed stainless steel construction and...09340756- SKU:
- 09340756
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- BORE SIZE IMPERIAL:
- 3.750'
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE SIZE:
- 3,750'
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- RUBBER
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
MSRP: $142.75Now: $134.00Was: $142.75Qty in Cart: 0Quantity:Price:MSRP: $142.75Now: $134.00Was: $142.75Subtotal: -
On Sale
COMETIC Top End Gasket - 1200 XL C9971
COMETIC
MSRP: $142.75Now: $134.00Was: $142.75A failing top-end gasket kit doesn't just leak—it compromises combustion efficiency and invites catastrophic engine damage. The COMETIC C9971 uses Extreme Sealing Technology with embossed stainless steel and a proprietary elastomer compound to eliminate...09340761- SKU:
- 09340761
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- DISPLACEMENT:
- 1200 CC
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
- MATERIAL:
- STAINLESS STEEL
- THICKNESS IMPERIAL:
- 0,030'
- TYPE:
- TOP END
MSRP: $142.75Now: $134.00Was: $142.75 -
On Sale
COMETIC Top End Gasket - .030" C9844
COMETIC
MSRP: $150.10Now: $141.00Was: $150.10A top-end rebuild demands precision gaskets that won't fail under heat and pressure—Cometic's EST technology delivers exactly that. This .030" kit eliminates hot spots by dispersing combustion heat evenly across the gasket surface, a critical advantage...09340762- SKU:
- 09340762
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE:
- 3,875'
- MATERIAL:
- STAINLESS STEEL
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.875'
- DISPLACEMENT:
- 95'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
MSRP: $150.10Now: $141.00Was: $150.10 -
On Sale
COMETIC Top End Gasket - 3-3/4" C9770
COMETIC
MSRP: $144.85Now: $136.00Was: $144.85A top-end rebuild demands precision gaskets that won't fail under combustion pressures and extreme temperatures. COMETIC's EST (Extreme Sealing Technology) gaskets use embossed stainless steel construction with proprietary rubber facing to eliminate hot...09340765- SKU:
- 09340765
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- TYPE:
- TOP END
- BORE SIZE:
- 3,750'
- RIDING STYLE:
- STREET
MSRP: $144.85Now: $136.00Was: $144.85Qty in Cart: 0Quantity:Price:MSRP: $144.85Now: $136.00Was: $144.85Subtotal: -
On Sale
COMETIC Top End Gasket - 3-5/8" C9918
COMETIC
MSRP: $135.40Now: $127.00Was: $135.40A failed top end gasket doesn't just leak—it compromises combustion efficiency and can lead to catastrophic engine damage if left unchecked. The COMETIC C9918 EST gasket kit eliminates the guesswork with precision-engineered components designed to handle...09340766- SKU:
- 09340766
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- BORE SIZE:
- 3,625'
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.625'
- MATERIAL:
- FOAM
- RIDING STYLE:
- STREET
- MATERIAL:
- ALUMINUM
- MATERIAL:
- VITON
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $135.40Now: $127.00Was: $135.40Qty in Cart: 0Quantity:Price:MSRP: $135.40Now: $127.00Was: $135.40Subtotal: -
On Sale
COMETIC Top End Gasket - 883 XL C9759
COMETIC
MSRP: $142.75Now: $134.00Was: $142.75A failed top-end gasket doesn't just leak—it compromises combustion efficiency and can lead to catastrophic engine damage. The COMETIC C9759 uses Extreme Sealing Technology (EST) to eliminate hot spots that typically cause gasket failure, ensuring...09340769- SKU:
- 09340769
- Availability:
- Ships Same Business Day
- Weight:
- 0.82 LBS
- BORE SIZE IMPERIAL:
- 3.000'
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 883 CC
- MATERIAL:
- STAINLESS STEEL
- THICKNESS IMPERIAL:
- 0,040'
- TYPE:
- TOP END
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE:
- 3,000'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 1.02 MM
MSRP: $142.75Now: $134.00Was: $142.75
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.
