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
-
On Sale
COMETIC Derby Cover Gasket - 5 Hole C9152F1
COMETIC
MSRP: $10.95Now: $10.00Was: $10.95Derby cover gasket for Harley Davidson models09341240- SKU:
- 09341240
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- EACH
- MATERIAL:
- SILICONE
- TYPE:
- CLUTCH COVER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- TYPE:
- DERBY COVER
MSRP: $10.95Now: $10.00Was: $10.95 -
On Sale
COMETIC Primary Gasket Kit C9888
COMETIC
MSRP: $130.15Now: $122.00Was: $130.15Cometic'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%...09340745- SKU:
- 09340745
- Availability:
- Ships Same Business Day
- Weight:
- 0.91 LBS
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- TYPE:
- PRIMARY
- UNITS:
- KIT
MSRP: $130.15Now: $122.00Was: $130.15 -
On Sale
COMETIC Top End Gasket - Twin Cam C9146
COMETIC
MSRP: $150.10Now: $141.00Was: $150.10EST (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...09341206- SKU:
- 09341206
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- DISPLACEMENT:
- 96'
- MATERIAL:
- RUBBER
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- STAINLESS STEEL
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,750'
- DISPLACEMENT:
- 88'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
MSRP: $150.10Now: $141.00Was: $150.10 -
On Sale
COMETIC Head Gasket - 3 5/8" - .040" C9985
COMETIC
MSRP: $61.90Now: $58.00Was: $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...09340797- SKU:
- 09340797
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- BORE SIZE:
- 3,625'
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- LAYERED STEEL
- MATERIAL:
- VITON
- THICKNESS:
- 1,02 MM (0,040')
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
MSRP: $61.90Now: $58.00Was: $61.90 -
On Sale
COMETIC Complete Gasket Kit - 1200 XL C9758F
COMETIC
MSRP: $279.25Now: $262.00Was: $279.25Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09340806- SKU:
- 09340806
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- BORE SIZE:
- 3,500'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- BORE SIZE IMPERIAL:
- 3.500'
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
MSRP: $279.25Now: $262.00Was: $279.25Qty in Cart: 0Quantity:Price:MSRP: $279.25Now: $262.00Was: $279.25Subtotal: -
On Sale
COMETIC Complete Gasket Kit - 1550 - .040 C9920
COMETIC
MSRP: $209.95Now: $197.00Was: $209.95Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09340807- SKU:
- 09340807
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 1.02 MM
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- BORE SIZE:
- 3,875'
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
MSRP: $209.95Now: $197.00Was: $209.95Qty in Cart: 0Quantity:Price:MSRP: $209.95Now: $197.00Was: $209.95Subtotal: -
On Sale
COMETIC Complete Gasket Kit - 4 Speed C9964
COMETIC
MSRP: $190.00Now: $179.00Was: $190.00Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09340809- SKU:
- 09340809
- Availability:
- Ships Same Business Day
- Weight:
- 1.76 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
MSRP: $190.00Now: $179.00Was: $190.00Qty in Cart: 0Quantity:Price:MSRP: $190.00Now: $179.00Was: $190.00Subtotal: -
On Sale
COMETIC Complete Gasket Kit - 5 Speed C9965
COMETIC
MSRP: $274.00Now: $258.00Was: $274.00Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09340811- SKU:
- 09340811
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
MSRP: $274.00Now: $258.00Was: $274.00 -
On Sale
COMETIC Complete Gasket Kit - 74" - FL C9900
COMETIC
MSRP: $222.55Now: $209.00Was: $222.55Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09340812- SKU:
- 09340812
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- BORE SIZE:
- 3,437'
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.437'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
MSRP: $222.55Now: $209.00Was: $222.55Qty in Cart: 0Quantity:Price:MSRP: $222.55Now: $209.00Was: $222.55Subtotal: -
On Sale
COMETIC Head Gasket - .040" - MLS C9205
COMETIC
MSRP: $61.90Now: $58.00Was: $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...09341402- SKU:
- 09341402
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE SIZE:
- 3,000'
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
- MATERIAL:
- LAYERED STEEL
- MATERIAL:
- VITON
- THICKNESS:
- 1,02 MM (0,040')
- BORE SIZE IMPERIAL:
- 3.000'
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
MSRP: $61.90Now: $58.00Was: $61.90 -
On Sale
COMETIC Gasket Kit - EVO/Big Twin C9130
COMETIC
MSRP: $110.20Now: $104.00Was: $110.20EST (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...09341203- SKU:
- 09341203
- Availability:
- Ships Same Business Day
- Weight:
- 0.77 LBS
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- RUBBER
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- MATERIAL:
- STAINLESS STEEL
- TYPE:
- TOP END
MSRP: $110.20Now: $104.00Was: $110.20 -
On Sale
COMETIC Complete Gasket Kit - 1200 EVO - .040" C9133
COMETIC
MSRP: $202.60Now: $190.00Was: $202.60Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09341204- SKU:
- 09341204
- Availability:
- Ships Same Business Day
- Weight:
- 1.74 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- MATERIAL:
- STEEL
- THICKNESS METRIC:
- 1.02 MM
- THICKNESS IMPERIAL:
- 0,040'
- BORE SIZE:
- 3,8125'
- BORE SIZE IMPERIAL:
- 3.8125'
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
MSRP: $202.60Now: $190.00Was: $202.60Qty in Cart: 0Quantity:Price:MSRP: $202.60Now: $190.00Was: $202.60Subtotal: -
On Sale
COMETIC Top End Gasket - Twin Cam C9147
COMETIC
MSRP: $150.10Now: $141.00Was: $150.10EST (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...09341207- SKU:
- 09341207
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 3.875'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- DISPLACEMENT:
- 103'
- DISPLACEMENT:
- 95'
- MATERIAL:
- STAINLESS STEEL
- BORE SIZE:
- 3,875'
- MATERIAL:
- RUBBER
MSRP: $150.10Now: $141.00Was: $150.10 -
On Sale
COMETIC Complete Gasket Kit - FXD C9148
COMETIC
MSRP: $209.95Now: $197.00Was: $209.95Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09341208- SKU:
- 09341208
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,750'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- MATERIAL:
- STEEL
MSRP: $209.95Now: $197.00Was: $209.95 -
On Sale
COMETIC Complete Gasket Kit - FXD C9149
COMETIC
MSRP: $209.95Now: $197.00Was: $209.95Every gasket in these kits uses the best materials possible for its intended application, Multi-Layer Steel (MLS) head gaskets, Steel Viton®-coated base gaskets, Blue Viton valve stem seals, Aluminum Foam Material (AFM) race-style exhaust gaskets,...09341209- SKU:
- 09341209
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- BORE SIZE:
- 3,875'
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 0.76 MM
- UNITS:
- KIT
MSRP: $209.95Now: $197.00Was: $209.95 -
On Sale
COMETIC Primary Gasket Kit C9150
COMETIC
MSRP: $121.75Now: $114.00Was: $121.75Cometic'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%...09341210- SKU:
- 09341210
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- TYPE:
- PRIMARY
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
MSRP: $121.75Now: $114.00Was: $121.75 -
On Sale
COMETIC Cam Cover Gasket - Big Twin C9302F5
COMETIC
Now: $22.00Was: $23.50COMETIC Cam Cover Gasket - Big Twin20111497- SKU:
- 20111497
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- TYPE:
- CAM COVER
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 5 PACK
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
Now: $22.00Was: $23.50 -
On Sale
COMETIC Cam Cover Gasket - Big Twin C9334F5
COMETIC
Now: $41.00Was: $44.00COMETIC Cam Cover Gasket - Big Twin20111499- SKU:
- 20111499
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- CAM COVER
Now: $41.00Was: $44.00 -
On Sale
COMETIC Cam Cover Gasket - XL C9311F5
COMETIC
Now: $50.00Was: $53.50COMETIC Cam Cover Gasket - XL20111501- SKU:
- 20111501
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- TYPE:
- CAM COVER
Now: $50.00Was: $53.50 -
On Sale
COMETIC Cam Cover Gasket - XL C9313F5
COMETIC
Now: $45.00Was: $48.20COMETIC Cam Cover Gasket - XL20111502- SKU:
- 20111502
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- CAM COVER
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS METRIC:
- 1.52 MM
- UNITS:
- 5 PACK
Now: $45.00Was: $48.20
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.
