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
-
JAMES GASKET Exhaust Port Gasket 17048-98
JAMES GASKET
$16.95Made in the U.S.A. by James GasketsDS173220- SKU:
- DS173220
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- EXHAUST
- RIDING STYLE:
- STREET
$16.95 -
JAMES GASKET Head/Base Gasket Kit - Twin Cam 17047-98
JAMES GASKET
$78.95Genuine James kits include matching head and base gaskets and O-rings where applicable, Made in the U.S.A.DS173219- SKU:
- DS173219
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- STANDARD
- THICKNESS IMPERIAL:
- -
- TYPE:
- CYLINDER HEAD
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- -
- MATERIAL:
- -
- STYLE:
- STANDARD BORE
$78.95 -
JAMES GASKET Rocker Cover Gasket Kit - Twin Cam 17033-99
JAMES GASKET
$81.95Made in the U.S.A.DS173218- SKU:
- DS173218
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- ROCKER BOX
- UNITS:
- KIT
$81.95 -
JAMES GASKET Rocker Housing Gasket - Twin Cam 16719-99
JAMES GASKET
$29.95Made from a solid steel sheet coated on two sides with a high-temperature elastomer. Strategically placed elastomer beading helps ensure a positive seal while our clear silicone conformal coating fills in minor imperfections in the flanges and provides...DS173215- SKU:
- DS173215
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MOUNTING POSITION:
- LOWER
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- PRODUCT NAME:
- GASKET
- FEATURES:
- BEADED
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- UNITS:
- PAIR
$29.95 -
COMETIC Rocker Gasket - EST - XL C9764
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.DS172076- SKU:
- DS172076
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- MODEL:
- EST
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$65.05 -
COMETIC Top End Gasket Kit - XL1200 - EST C9763
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...DS172075- SKU:
- DS172075
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- BORE SIZE:
- 3,500'
- DISPLACEMENT:
- 1200 CC
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.500'
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- TOP END
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
$142.75 -
COMETIC Top End Gasket Kit - XL1100 - EST C9761
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...DS172073- SKU:
- DS172073
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- MATERIAL:
- STAINLESS STEEL
- THICKNESS METRIC:
- 0.51 MM
- BORE SIZE:
- 3,350'
- DISPLACEMENT:
- 1100 CC
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.350'
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- THICKNESS IMPERIAL:
- 0,020'
$142.75 -
COMETIC Top End Gasket Kit - XL883 - EST C9760
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...DS172072- SKU:
- DS172072
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE SIZE IMPERIAL:
- 3.000'
- DISPLACEMENT:
- 883 CC
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,000'
- MATERIAL:
- RUBBER
- TYPE:
- TOP END
- UNITS:
- KIT
- MATERIAL:
- STAINLESS STEEL
- THICKNESS IMPERIAL:
- 0,040'
- THICKNESS METRIC:
- 1.02 MM
$142.75 -
COMETIC Rocker Gasket - EST - Big Twin C9753
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.DS172065- SKU:
- DS172065
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- UNITS:
- KIT
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET KIT
- MODEL:
- EST
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$65.05 -
COMETIC Rocker Box Gasket - XL C9066
COMETIC
$47.20Premium 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.DS172059- SKU:
- DS172059
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MODEL:
- EST
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- MATERIAL:
- PAPER
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$47.20 -
COMETIC Rocker Box Gasket C9078
COMETIC
$47.20Premium 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.DS172057- SKU:
- DS172057
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- MODEL:
- EST
- TYPE:
- ROCKER BOX
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$47.20 -
COMETIC Base Gasket 3-5/8" - EVO/XL C9555
COMETIC
$33.55Cylinder base gasket for Sportster modelsDS172054- SKU:
- DS172054
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 3.625'
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- CYLINDER BASE
$33.55 -
COMETIC Metal Base Gasket - EVO/XL C9553
COMETIC
$33.55Cylinder base gasket for Sportster modelsDS172053- SKU:
- DS172053
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BORE SIZE IMPERIAL:
- STANDARD
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,51 MM (0,020')
- UNITS:
- PAIR
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- CYLINDER BASE
- THICKNESS IMPERIAL:
- 0,020'
$33.55Qty in Cart: 0Quantity:Price:$33.55Subtotal: -
COMETIC Base Gasket - 3-5/8" - EVO/Big Twin C9552
COMETIC
$33.55Cylinder base gasket for Sportster modelsDS172052- SKU:
- DS172052
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS IMPERIAL:
- 0,020'
- MATERIAL:
- STEEL
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- CYLINDER BASE
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
$33.55 -
COMETIC Metal Base Gasket - Big Twin C9551
COMETIC
$33.55Cylinder base gasket for Sportster modelsDS172051- SKU:
- DS172051
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- MATERIAL:
- STEEL
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- CYLINDER BASE
- THICKNESS:
- 0,51 MM (0,020')
- THICKNESS IMPERIAL:
- 0,020'
- RIDING STYLE:
- STREET
$33.55 -
COMETIC Copper Base Gasket - XL C9025
COMETIC
$17.80Center 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...DS172050- SKU:
- DS172050
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- CYLINDER BASE
- MATERIAL:
- COPPER
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- UNITS:
- EACH
$17.80 -
COMETIC Left Rocker Box Gasket - Big Twin C9562
COMETIC
$20.10Viton gaskets feature a stainless steel core with a .001"-thick coating of Viton rubber on both sides., Made in the U.S.A.DS172048- SKU:
- DS172048
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- ROCKER COVER
- UNITS:
- 5 PACK
- MATERIAL:
- VITON
- MOUNTING POSITION:
- LEFT
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS METRIC:
- 0.25 MM
$20.10 -
COMETIC Rocker Box Gasket Kit - Twin Cam C9588
COMETIC
$46.15Premium 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.DS172013- SKU:
- DS172013
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- TYPE:
- ROCKER BOX
- MODEL:
- EST
- UNITS:
- KIT
$46.15 -
COMETIC Right Lower Rocker Box Gasket C9560
COMETIC
$16.90Viton gaskets feature a stainless steel core with a .001"-thick coating of Viton rubber on both sides., Made in the U.S.A.DS172004- SKU:
- DS172004
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- THICKNESS IMPERIAL:
- 0,010'
- TYPE:
- ROCKER COVER
- UNITS:
- 5 PACK
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- MATERIAL:
- VITON
- MOUNTING POSITION:
- LOWER
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS METRIC:
- 0.25 MM
$16.90 -
JAMES GASKET Inspection Gasket Metal/Rubber - Big Twin 60567-90-DL
JAMES GASKET
$9.95Latest additions to our line of high-quality genuine James gaskets, seals and O-rings, Cover seals are a seal, not a gasket, Cover seals are molded rubber, beaded oil seals with metal inserts and work with all inspection and derby covers; fit billet,...78081027- SKU:
- 78081027
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- FEATURES:
- BEADED
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- STEEL
- STYLE:
- PRIMARY
- THICKNESS METRIC:
- 2.50 MM
- TYPE:
- INSPECTION COVER
- THICKNESS:
- 2,50 MM (0,100')
- THICKNESS IMPERIAL:
- 0,100'
- MATERIAL:
- RUBBER
$9.95
