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 Points Cover Gasket C9323
COMETIC
$8.90Made in the U.S.A.09344678- SKU:
- 09344678
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- THICKNESS IMPERIAL:
- 0,031'
- UNITS:
- 10 PACK
- MATERIAL:
- FIBER
- THICKNESS:
- 0,79 MM (0,031')
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
- TYPE:
- POINT COVER
$8.90 -
COMETIC Generator Mount Gasket C9321F
COMETIC
$4.20Made in the U.S.A.09344676- SKU:
- 09344676
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- THICKNESS IMPERIAL:
- 0,032'
- UNITS:
- 5 PACK
- TYPE:
- GENERATOR
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS METRIC:
- 0.81 MM
$4.20Qty in Cart: 0Quantity:Price:$4.20Subtotal: -
COMETIC Clutch Cover Gasket - XL C9319-1
COMETIC
$7.95Clutch 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...09344674- SKU:
- 09344674
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- CLUTCH COVER
- UNITS:
- EACH
- MATERIAL:
- FIBER
- MODEL:
- HI-PERFORMANCE
- THICKNESS IMPERIAL:
- 0,031'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
$7.95Qty in Cart: 0Quantity:Price:$7.95Subtotal: -
COMETIC Oil Pump Cover Gasket C9382-010
COMETIC
$12.70Made in the U.S.A.09341652- SKU:
- 09341652
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- UNITS:
- 12 PACK
- MATERIAL:
- RUBBER
- THICKNESS METRIC:
- 0.25 MM
- TYPE:
- OIL PUMP COVER
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
$12.70 -
COMETIC Cam Cover Gasket - .032" C9328F5-032
COMETIC
$26.60COMETIC Cam Cover Gasket - .032"09341646- SKU:
- 09341646
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CAM COVER
$26.60Qty in Cart: 0Quantity:Price:$26.60Subtotal: -
COMETIC Front Tappet Block Gasket C9298
COMETIC
$6.40Made in the U.S.A.09341645- SKU:
- 09341645
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS IMPERIAL:
- 0,020'
- TYPE:
- TAPPET BLOCK
- MATERIAL:
- FIBER
- MOUNTING POSITION:
- FRONT
- THICKNESS METRIC:
- 0.51 MM
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
$6.40 -
COMETIC Top Cover Gasket C9488F
COMETIC
$27.00Top end gasket kits include correct base, head gasket and cylinder O-rings as well as other top end specific O-rings or seals needed for R&R of top end, MLS head gaskets promote an even torque load across the gasket sealing surface, providing less bore...09341382- SKU:
- 09341382
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- TRANSMISSION TOP COVER
- RIDING STYLE:
- STREET
$27.00Qty in Cart: 0Quantity:Price:$27.00Subtotal: -
COMETIC Top Cover Gasket C9522F
COMETIC
$7.40Top end gasket kits include correct base, head gasket and cylinder O-rings as well as other top end specific O-rings or seals needed for R&R of top end, MLS head gaskets promote an even torque load across the gasket sealing surface, providing less bore...09341378- SKU:
- 09341378
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- TRANSMISSION TOP COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
$7.40Qty in Cart: 0Quantity:Price:$7.40Subtotal: -
COMETIC Trans End Cover Gasket C9515-032AFM
COMETIC
$29.70Top end gasket kits include correct base, head gasket and cylinder O-rings as well as other top end specific O-rings or seals needed for R&R of top end, MLS head gaskets promote an even torque load across the gasket sealing surface, providing less bore...09341375- SKU:
- 09341375
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- UNITS:
- 10 PACK
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,032'
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- TRANSMISSION END COVER
$29.70 -
COMETIC Lower Rocker Box Rubber Gasket C9281
COMETIC
$23.20Viton gaskets feature a stainless steel core with a .001"-thick coating of Viton rubber on both sides., Made in the U.S.A.09341349- SKU:
- 09341349
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- 5 PACK
- MATERIAL:
- VITON
- MOUNTING POSITION:
- LOWER
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER COVER
- PRODUCT NAME:
- GASKET
$23.20Qty in Cart: 0Quantity:Price:$23.20Subtotal: -
COMETIC Inner Rocker Box Rubber Gasket C9283
COMETIC
$14.80Viton gaskets feature a stainless steel core with a .001"-thick coating of Viton rubber on both sides., Made in the U.S.A.09341348- SKU:
- 09341348
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- ROCKER COVER
- MATERIAL:
- VITON
- MOUNTING POSITION:
- INNER
- UNITS:
- 5 PACK
- RIDING STYLE:
- STREET
$14.80Qty in Cart: 0Quantity:Price:$14.80Subtotal: -
COMETIC Complete Gasket Kit - FLT C9172
COMETIC
$287.65Every 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,...09341220- SKU:
- 09341220
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,750'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$287.65 -
COMETIC Rocker Box Gasket Kit - Screamin' Eagle C9167
COMETIC
$56.65Premium materials used for specific applications to provide a long, service free life. Made in the U.S.A.09341217- SKU:
- 09341217
- Availability:
- Ships Same Business Day
- Weight:
- 0.49 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- MATERIAL:
- STEEL
- MODEL:
- EST
- FEATURES:
- FOR SCREAMIN' EAGLE ROCKER BOXES
$56.65 -
COMETIC Head Gasket - .060"- MLS Standard C9158
COMETIC
$90.25Center 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...09341214- SKU:
- 09341214
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
- BORE SIZE:
- 3,750'
- DISPLACEMENT:
- 96'
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- CYLINDER HEAD
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.750'
- THICKNESS METRIC:
- 1.52 MM
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$90.25Qty in Cart: 0Quantity:Price:$90.25Subtotal: -
COMETIC Top End Gasket - Standard - XB C9856
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...09340817- SKU:
- 09340817
- Availability:
- Ships Same Business Day
- Weight:
- 0.79 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,500'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
$142.75 -
COMETIC Base Gasket - 3-5/8" C9988
COMETIC
$33.55Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes, MLS (Multi-Layer Steel) head gaskets promote an even torque load across the gasket...09340783- SKU:
- 09340783
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- PRODUCT NAME:
- GASKET
- STYLE:
- STANDARD
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,51 MM (0,020')
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- TYPE:
- CYLINDER BASE
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
$33.55Qty in Cart: 0Quantity:Price:$33.55Subtotal: -
COMETIC Base Gasket - XL 3-5/8" C9554
COMETIC
$33.55Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes, MLS (Multi-Layer Steel) head gaskets promote an even torque load across the gasket...09340782- SKU:
- 09340782
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 0.25 MM
- RIDING STYLE:
- STREET
- STYLE:
- BIG BORE
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
$33.55Qty in Cart: 0Quantity:Price:$33.55Subtotal: -
COMETIC Base Gasket - Standard C9987
COMETIC
$33.55Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes, MLS (Multi-Layer Steel) head gaskets promote an even torque load across the gasket...09340781- SKU:
- 09340781
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- PRODUCT NAME:
- GASKET
- STYLE:
- STANDARD
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS IMPERIAL:
- 0,020'
- BORE SIZE IMPERIAL:
- 3.500'
- MATERIAL:
- RUBBER
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- MATERIAL:
- STEEL
- THICKNESS METRIC:
- 0.51 MM
$33.55 -
COMETIC Base Gasket - 4.125" - .020" C9739
COMETIC
$33.55Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes, MLS (Multi-Layer Steel) head gaskets promote an even torque load across the gasket...09340779- SKU:
- 09340779
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- PRODUCT NAME:
- GASKET
- STYLE:
- STANDARD
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS IMPERIAL:
- 0,020'
- MATERIAL:
- STEEL
- THICKNESS METRIC:
- 0.51 MM
$33.55 -
COMETIC Base Gasket - 4-1/8" Twin Cam - .010" C9938
COMETIC
$33.55Outer layers are embossed and coated on both sides with Viton to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes, MLS (Multi-Layer Steel) head gaskets promote an even torque load across the gasket...09340778- SKU:
- 09340778
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- THICKNESS METRIC:
- 0.25 MM
- RIDING STYLE:
- STREET
- STYLE:
- STANDARD
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- MATERIAL:
- STEEL
$33.55Qty in Cart: 0Quantity:Price:$33.55Subtotal:
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.
