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 Top End Gasket - 883 XL C9759
COMETIC
$142.75EST (Extreme Sealing Technology) gasket kits include embossed stainless steel head, base, and rocker gaskets covered with a proprietary rubber material, Head gasket material allows heat to be drawn away from the combustion ring and dissipated evenly...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
$142.75 -
COMETIC Head Gasket - .043" C9239
COMETIC
$56.65Center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements, Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load...09350397- SKU:
- 09350397
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- CFM
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.043'
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,043'
- TYPE:
- CYLINDER HEAD
$56.65 -
COMETIC Top End Gasket Kit - 95" - Twin Cam - EST C9780
COMETIC
$181.60EST (Extreme Sealing Technology) gasket kits include embossed stainless steel head, base, and rocker gaskets covered with a proprietary rubber material, Head gasket material allows heat to be drawn away from the combustion ring and dissipated evenly...DS172085- SKU:
- DS172085
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE:
- 3,875'
- MATERIAL:
- STAINLESS STEEL
- DISPLACEMENT:
- 95'
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
$181.60Qty in Cart: 0Quantity:Price:$181.60Subtotal: -
COMETIC Head Gasket -.04"- Evo - 3.625" C9691
COMETIC
$61.90Center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements, Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load...DS172089- SKU:
- DS172089
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.670'
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 1,02 MM (0,040')
- THICKNESS IMPERIAL:
- 0,040'
- TYPE:
- CYLINDER HEAD
- BORE SIZE:
- 3,670'
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$61.90Qty in Cart: 0Quantity:Price:$61.90Subtotal: -
COMETIC Head Gasket - .040 - 88" - Twin Cam C9745
COMETIC
$61.90Center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements, Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load...DS172107- SKU:
- DS172107
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- LAYERED STEEL
- THICKNESS IMPERIAL:
- 0,040'
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 1,02 MM (0,040')
- TYPE:
- CYLINDER HEAD
- BORE SIZE:
- 3,750'
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- PAIR
$61.90Qty in Cart: 0Quantity:Price:$61.90Subtotal: -
COMETIC Oil Pump Gasket - AFM C9399F
COMETIC
$7.40Made in the U.S.A.09350236- SKU:
- 09350236
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- RIDING STYLE:
- STREET
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- THICKNESS:
- 0,032'
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.032'
$7.40Qty in Cart: 0Quantity:Price:$7.40Subtotal: -
COMETIC Oil Pump Gasket - AFM C9315F
COMETIC
$6.40Made in the U.S.A.09350237- SKU:
- 09350237
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- THICKNESS IMPERIAL:
- 0.032'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,032'
- TYPE:
- OIL PUMP
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$6.40 -
COMETIC Top End Gasket Kit - Twin Cooled - .030" C10138-030
COMETIC
$183.70EST (Extreme Sealing Technology) gasket kits include embossed stainless steel head, base, and rocker gaskets covered with a proprietary rubber material, Head gasket material allows heat to be drawn away from the combustion ring and dissipated evenly...09344837- SKU:
- 09344837
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE:
- 4,000'
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 4.000'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,030'
- DISPLACEMENT:
- 110'
- THICKNESS METRIC:
- 0.76 MM
- MATERIAL:
- RUBBER
- MATERIAL:
- VITON
- UNITS:
- KIT
$183.70Qty in Cart: 0Quantity:Price:$183.70Subtotal: -
COMETIC Top End Gasket Kit - Twin Cam C9949-030
COMETIC
$146.95EST (Extreme Sealing Technology) gasket kits include embossed stainless steel head, base, and rocker gaskets covered with a proprietary rubber material, Head gasket material allows heat to be drawn away from the combustion ring and dissipated evenly...09344840- SKU:
- 09344840
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE:
- 4,000'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 4.000'
- THICKNESS IMPERIAL:
- 0,030'
- DISPLACEMENT:
- 110'
- THICKNESS METRIC:
- 0.76 MM
- UNITS:
- KIT
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
$146.95 -
COMETIC Primary Gasket C10145F5
COMETIC
$141.70COMETIC Primary Gasket09345061- SKU:
- 09345061
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- THICKNESS IMPERIAL:
- 0.060'
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- PRIMARY COVER
- UNITS:
- 5 PACK
- MOUNTING POSITION:
- OUTER
- THICKNESS METRIC:
- 1.52 MM
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$141.70Qty in Cart: 0Quantity:Price:$141.70Subtotal: -
COMETIC Clutch Cover Gasket C10147F1
COMETIC
$10.95Clutch cover gaskets are made form an AFM Material which is a chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core, Aluminum core gives the gasket strength for a superior seal and prevents the gasket from weeping or crawling...09345064- SKU:
- 09345064
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- MODEL:
- HI-PERFORMANCE
$10.95 -
COMETIC Clutch Cover Gasket C10147F5
COMETIC
$37.75Clutch cover gaskets are made form an AFM Material which is a chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core, Aluminum core gives the gasket strength for a superior seal and prevents the gasket from weeping or crawling...09345065- SKU:
- 09345065
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MODEL:
- HI-PERFORMANCE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- TYPE:
- CLUTCH COVER
- THICKNESS IMPERIAL:
- 0.060'
$37.75Qty in Cart: 0Quantity:Price:$37.75Subtotal: -
COMETIC Primary Gasket Kit C10148
COMETIC
$56.65Cometic's proprietary AFM (Aluminum Foamette Material) gaskets feature an aluminum core with a chemically blown, compounded nitrile synthetic rubber bonded to the outside, Gaskets have resistance to temperatures of more than 2500°F, Have an 85%...09345066- SKU:
- 09345066
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- TYPE:
- PRIMARY
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$56.65 -
COMETIC Inspection Cover Gasket C10152F1
COMETIC
$11.95Made in the U.S.A.09345070- SKU:
- 09345070
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- INSPECTION COVER
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- EACH
$11.95 -
COMETIC Breather Gasket - Big Twin C10114
COMETIC
$12.00Replacement rocker box breather cover gasket09344735- SKU:
- 09344735
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- TYPE:
- BREATHER
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
$12.00 -
COMETIC Push Rod Gasket Set C10068
COMETIC
$14.95COMETIC Push Rod Gasket Set09344652- SKU:
- 09344652
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- PUSHROD COVER
- UNITS:
- KIT
$14.95Qty in Cart: 0Quantity:Price:$14.95Subtotal: -
COMETIC Rocker Cover Gasket - Big Twin C9336-2
COMETIC
$6.95Viton gaskets feature a stainless steel core with a .001"-thick coating of Viton rubber on both sides., Made in the U.S.A.09344684- SKU:
- 09344684
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ROCKER COVER BASE
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- THICKNESS IMPERIAL:
- 0,031'
- MATERIAL:
- FIBER
- THICKNESS:
- 0,79 MM (0,031')
$6.95Qty in Cart: 0Quantity:Price:$6.95Subtotal: -
COMETIC Primary Cover Gasket C9703F1
COMETIC
$24.10Cometic's proprietary AFM (Aluminum Foamette Material) gaskets feature an aluminum core with a chemically blown, compounded nitrile synthetic rubber bonded to the outside, Gaskets have resistance to temperatures of more than 2500°F, Have an 85%...09344722- SKU:
- 09344722
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- EACH
- MATERIAL:
- FIBER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,79 MM (0,031')
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- PRIMARY
$24.10 -
COMETIC Transmission/Engine Case Gasket C9190F5
COMETIC
$65.00High-quality products for long-term reliability, Manufactured from premium fuel-resistant materials that will not creep, crack or become brittle., Made in the U.S.A.09342019- SKU:
- 09342019
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- TYPE:
- TRANSMISSION
$65.00 -
COMETIC Shift Shaft Tube Gasket C9005
COMETIC
$8.30Multi-layer steel gaskets feature two outer Viton-coated embossed spring steel layers with an inner steel layer to provide additional support. Made in the U.S.A.09342020- SKU:
- 09342020
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 1.52 MM
- TYPE:
- PRIMARY SPACER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- STEEL
- THICKNESS:
- 1,52 MM (0,060')
$8.30
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.
