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 - XL 1200 C9177
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...09341225- SKU:
- 09341225
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- TYPE:
- TOP END
- DISPLACEMENT:
- 1200 CC
- MATERIAL:
- RUBBER
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$142.75 -
COMETIC Primary Gasket C9179F1
COMETIC
$46.15Cometic'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%...09341226- SKU:
- 09341226
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- PRIMARY
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
- MOUNTING POSITION:
- OUTER
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
$46.15 -
COMETIC Complete Gasket Kit - FL 103 C9185
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,...09341230- SKU:
- 09341230
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- RIDING STYLE:
- STREET
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- BORE SIZE:
- 3,875'
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- MATERIAL:
- STEEL
$287.65 -
COMETIC Complete Gasket Kit - Dyna C9186
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,...09341231- SKU:
- 09341231
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE:
- 3,875'
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- UNITS:
- KIT
$287.65 -
COMETIC Trans End Cover Gasket - Twin Cam C9188
COMETIC
$19.90Aluminum Foamette Material gaskets feature an aluminum core and a chemically blown, compounded nitrile synthetic rubber coating that is bonded to the outside layer; do not require gasket sealer., Made in the U.S.A.09341233- SKU:
- 09341233
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- THICKNESS:
- 1,52 MM (0,060')
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 10 PACK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- TYPE:
- END COVER
- THICKNESS METRIC:
- 1.52 MM
- TYPE:
- CLUTCH RELEASE
$19.90 -
COMETIC Transmission Top Cover Gasket Cover - Twin Cam C9189
COMETIC
$18.50Aluminum Foamette Material gaskets feature an aluminum core and a chemically blown, compounded nitrile synthetic rubber coating that is bonded to the outside layer; do not require gasket sealer., Made in the U.S.A.09341234- SKU:
- 09341234
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- TRANSMISSION TOP COVER
- THICKNESS:
- 1,52 MM (0,060')
$18.50 -
COMETIC Rocker Box Kit - XL C9195
COMETIC
$65.05Premium materials used for specific applications to provide a long, service free life, Kits include all gaskets, seals, O-rings and quality bolt seals needed when servicing both rocker boxes, Made in the U.S.A.09341236- SKU:
- 09341236
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- MATERIAL:
- STEEL
- MODEL:
- EST
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$65.05 -
COMETIC Exhaust Gasket - EVO/Twin Cam C9540
COMETIC
$59.20Gasket material and construction will vary by application to ensure longevity with leak free performance under all conditions, 4-stroke applications utilize a double-sided Viton® rubber-coated stainless steel gasket providing precise, high-temperature...09341237- SKU:
- 09341237
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- EXHAUST PORT
- RIDING STYLE:
- STREET
- MATERIAL:
- GRAPHITE
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- 10 PACK
$59.20 -
COMETIC Exhaust Gasket - VROD C9928
COMETIC
$15.95Gasket material and construction will vary by application to ensure longevity with leak free performance under all conditions, 4-stroke applications utilize a double-sided Viton® rubber-coated stainless steel gasket providing precise, high-temperature...09341239- SKU:
- 09341239
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- PAIR
- PRODUCT NAME:
- GASKET
- MATERIAL:
- GRAPHITE
- RIDING STYLE:
- STREET
- TYPE:
- EXHAUST
$15.95 -
COMETIC Complete Gasket Kit - FLT C9778F
COMETIC
$282.40Every 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,...09340728- SKU:
- 09340728
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- TYPE:
- COMPLETE
- UNITS:
- KIT
- BORE SIZE:
- 3,750'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
$282.40 -
COMETIC Complete Gasket - Softail/FXD C9751F
COMETIC
$356.95Every 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,...09340730- SKU:
- 09340730
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- BORE SIZE:
- 3,500'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- BORE SIZE IMPERIAL:
- 3.500'
- TYPE:
- COMPLETE
- UNITS:
- KIT
$356.95 -
COMETIC Motor Gasket Kit - Standard - EVO C9891
COMETIC
$183.70Every 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, Made...09340732- SKU:
- 09340732
- Availability:
- Ships Same Business Day
- Weight:
- 1.67 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- STEEL
- TYPE:
- MOTOR
- UNITS:
- KIT
$183.70 -
COMETIC Motor Gasket Kit - Standard - EVO C9890
COMETIC
$159.55Every 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, Made...09340733- SKU:
- 09340733
- Availability:
- Ships Same Business Day
- Weight:
- 1.67 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- MOTOR
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
$159.55 -
COMETIC Complete Gasket Kit - Standard - XB9 C9857
COMETIC
$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,...09340734- SKU:
- 09340734
- Availability:
- Ships Same Business Day
- Weight:
- 1.75 LBS
- BORE SIZE IMPERIAL:
- STANDARD
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- BORE SIZE:
- STANDARD
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
$202.60Qty in Cart: 0Quantity:Price:$202.60Subtotal: -
COMETIC Motor Gasket Kit - XL - .030" C9953
COMETIC
$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,...09340735- SKU:
- 09340735
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE IMPERIAL:
- 3.500'
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,500'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 0.76 MM
$202.60Qty in Cart: 0Quantity:Price:$202.60Subtotal: -
COMETIC Oil Jet Gasket - XL C9962
COMETIC
$8.50Made in the U.S.A.09340737- SKU:
- 09340737
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- UNITS:
- 6 PACK
- MATERIAL:
- FIBER
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,51 MM (0,020')
- TYPE:
- OIL JET ASSEMBLY
$8.50Qty in Cart: 0Quantity:Price:$8.50Subtotal: -
COMETIC Top End Gasket -.045" C9951
COMETIC
$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...09340755- SKU:
- 09340755
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- THICKNESS IMPERIAL:
- 0,045'
- THICKNESS METRIC:
- 1.14 MM
- TYPE:
- TOP END
- BORE SIZE:
- 3,875'
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- DISPLACEMENT:
- 95'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.875'
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- STREET
$150.10 -
COMETIC Top End Gasket - 1200 XL C9970
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...09340759- SKU:
- 09340759
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
- THICKNESS IMPERIAL:
- 0,040'
- TYPE:
- TOP END
- DISPLACEMENT:
- 1200 CC
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 1.02 MM
$142.75 -
COMETIC Top End Gasket - 1200 XL C9854F
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...09340760- SKU:
- 09340760
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- RUBBER
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,030'
- TYPE:
- TOP END
- DISPLACEMENT:
- 1200 CC
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
$142.75 -
COMETIC Top End Gasket - 3-13/16" C9768
COMETIC
$173.20EST (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...09340764- SKU:
- 09340764
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE IMPERIAL:
- 3.8125'
- MATERIAL:
- STAINLESS STEEL
- BORE SIZE:
- 3,8125'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- KIT
- MATERIAL:
- RUBBER
$173.20
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.
