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 Valve Guide C9419-4
COMETIC
$8.90Made in the U.S.A.09344702- SKU:
- 09344702
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,79 MM (0,031')
- TYPE:
- VALVE GUIDE
- UNITS:
- 4 PACK
- MATERIAL:
- FIBER
- THICKNESS IMPERIAL:
- 0,031'
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.79 MM
$8.90 -
COMETIC Cylinder Base Gasket C9893
COMETIC
$28.30Cylinder base gasket for Sportster models09344725- SKU:
- 09344725
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- BORE SIZE IMPERIAL:
- 3.8125'
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
$28.30 -
COMETIC Filter/Carb Gasket C9304
COMETIC
$12.70Viton gaskets feature a stainless steel core with a .001"-thick coating of Viton rubber on both sides., Made in the U.S.A.09342018- SKU:
- 09342018
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- THICKNESS METRIC:
- 1.52 MM
- TYPE:
- CARBURETOR BACKING PLATE
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$12.70 -
COMETIC Gasket C9196F5
COMETIC
$30.10Viton gaskets feature a stainless steel core with a .001"-thick coating of Viton rubber on both sides., Made in the U.S.A.09343175- SKU:
- 09343175
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MOUNTING POSITION:
- UPPER
- MATERIAL:
- SILICONE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- ROCKER COVER
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
$30.10 -
COMETIC Head Gasket - 3.875" x .030" C10081-030
COMETIC
$59.80Center 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...09343143- SKU:
- 09343143
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- THICKNESS:
- 0,76 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE:
- 3,875'
- MATERIAL:
- VITON
- BORE SIZE IMPERIAL:
- 3.875'
- TYPE:
- CYLINDER HEAD
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
- UNITS:
- PAIR
$59.80 -
COMETIC Head Gasket - 3.875" x .040" C10081-040
COMETIC
$59.80Center 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...09343144- SKU:
- 09343144
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- MATERIAL:
- VITON
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- PAIR
- THICKNESS IMPERIAL:
- 0,040'
- BORE SIZE:
- 3,875'
- THICKNESS:
- 1,02 MM (0,040')
- TYPE:
- CYLINDER HEAD
$59.80Qty in Cart: 0Quantity:Price:$59.80Subtotal: -
COMETIC Head Gasket - 3.937"x .040" C10083-040
COMETIC
$59.80Center 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...09343146- SKU:
- 09343146
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- BORE SIZE:
- 3,937'
- BORE SIZE IMPERIAL:
- 3.937'
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- PAIR
- THICKNESS:
- 1,02 MM (0,040')
- THICKNESS IMPERIAL:
- 0,040'
- TYPE:
- CYLINDER HEAD
$59.80 -
COMETIC Head Gasket - 4.060" x .040" C10085-040
COMETIC
$59.80Center 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...09343150- SKU:
- 09343150
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
- BORE SIZE IMPERIAL:
- 4.060'
- MATERIAL:
- VITON
- BORE SIZE:
- 4,060'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,02 MM (0,040')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
$59.80 -
COMETIC Head Gasket - 4.160" x .030" C10087-030
COMETIC
$59.80Center 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...09343153- SKU:
- 09343153
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE SIZE IMPERIAL:
- 4.160'
- THICKNESS:
- 0,76 MM (0,030')
- THICKNESS IMPERIAL:
- 0,030'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- BORE SIZE:
- 4,160'
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 0.76 MM
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
$59.80 -
COMETIC Head Gasket - 4.250" x .030" C10088-030
COMETIC
$59.80Center 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...09343155- SKU:
- 09343155
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BORE SIZE:
- 4,250'
- BORE SIZE IMPERIAL:
- 4.250'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
- UNITS:
- PAIR
- MATERIAL:
- VITON
- THICKNESS:
- 0,76 MM (0,030')
- TYPE:
- CYLINDER HEAD
- THICKNESS IMPERIAL:
- 0,030'
$59.80 -
COMETIC Engine Gasket Kit - Big Twin C10091
COMETIC
$141.70Every 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,...09344068- SKU:
- 09344068
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MATERIAL:
- STEEL
- TYPE:
- MOTOR
- UNITS:
- KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$141.70Qty in Cart: 0Quantity:Price:$141.70Subtotal: -
COMETIC Complete Gasket Kit - Softail C9221
COMETIC
$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,...09341657- SKU:
- 09341657
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- MATERIAL:
- STEEL
- UNITS:
- KIT
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- BORE SIZE:
- 4,125'
- BORE SIZE IMPERIAL:
- 4.125'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
$209.95 -
COMETIC Complete Gasket Kit - FXD C9221-030
COMETIC
$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,...09341658- SKU:
- 09341658
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- UNITS:
- KIT
- BORE SIZE:
- 4,125'
- BORE SIZE IMPERIAL:
- 4.125'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- VITON
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
- RIDING STYLE:
- STREET
$209.95 -
COMETIC Complete Gasket Kit - FL C9222-030
COMETIC
$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,...09341660- SKU:
- 09341660
- Availability:
- Ships Same Business Day
- Weight:
- 1.71 LBS
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- UNITS:
- KIT
- MATERIAL:
- VITON
- THICKNESS IMPERIAL:
- 0,030'
- THICKNESS METRIC:
- 0.76 MM
- BORE SIZE:
- 4,125'
- BORE SIZE IMPERIAL:
- 4.125'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$209.95 -
COMETIC Top End Gasket - Twin Cam - 4-1/8" C9976
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...09341662- SKU:
- 09341662
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- MATERIAL:
- RUBBER
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- KIT
- BORE SIZE:
- 4,125'
- BORE SIZE IMPERIAL:
- 4.125'
- TYPE:
- TOP END
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 0.51 MM
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS IMPERIAL:
- 0,040'
$150.10 -
COMETIC Carb Back Plate Gasket C9626F
COMETIC
$13.50Aluminum 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.09341342- SKU:
- 09341342
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- TYPE:
- CARBURETOR BACKING PLATE
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- UNITS:
- 10 PACK
- THICKNESS:
- 1,52 MM (0,060')
$13.50 -
COMETIC Filter Mount Gasket C9634F
COMETIC
$13.90Aluminum 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.09341343- SKU:
- 09341343
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- THICKNESS:
- 1,52 MM (0,060')
- THICKNESS IMPERIAL:
- 0.060'
- TYPE:
- AIR FILTER
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- TYPE:
- BACKPLATE
- UNITS:
- 10 PACK
$13.90 -
COMETIC Rear Tapped Gasket - Big Twin C9297F
COMETIC
$5.30Made in the U.S.A.09341351- SKU:
- 09341351
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- THICKNESS:
- 0,81 MM (0,032')
- UNITS:
- 10 PACK
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- TYPE:
- TAPPET GUIDE
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,032'
- THICKNESS METRIC:
- 0.81 MM
$5.30 -
COMETIC Front Tappet Gasket - Big Twin C9298F
COMETIC
$6.40Made in the U.S.A.09341352- SKU:
- 09341352
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET
- THICKNESS:
- 0,81 MM (0,032')
- TYPE:
- TAPPET GUIDE
- UNITS:
- 10 PACK
- THICKNESS METRIC:
- 0.81 MM
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- FRONT
- THICKNESS IMPERIAL:
- 0,032'
$6.40 -
COMETIC Head Gasket - .03" - Evo - 3.75" C9694
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...09341353- SKU:
- 09341353
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.750'
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE:
- 3,750'
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 0,76 MM (0,030')
- TYPE:
- CYLINDER HEAD
$61.90
