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
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JAMES GASKET Top End Gasket Kit - S&S 17040-04-SS
JAMES GASKET
$152.20A top-end rebuild demands precision-engineered gaskets that won't fail under extreme cylinder pressures and temperature swings. JAMES GASKET delivers OEM-quality sealing surfaces with the durability to handle repeated heat cycles without weeping or...09341590- SKU:
- 09341590
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE SIZE IMPERIAL:
- 4.000'
- THICKNESS IMPERIAL:
- 0,020'
- THICKNESS METRIC:
- 0.51 MM
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
$152.20 -
JAMES GASKET Carb Gasket - S&S Super E 29058-SSE
JAMES GASKET
$7.70A quality carb gasket is critical to maintaining proper fuel atomization and preventing air leaks that compromise throttle response and fuel economy. The JAMES GASKET Carb Gasket for S&S Super E carburetors delivers OEM-level sealing integrity without...09341612- SKU:
- 09341612
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- STYLE:
- AIR CLEANER
- MOUNTING POSITION:
- AIR CLEANER TO CARBURETOR
- TYPE:
- CARBURETOR
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
$7.70 -
JAMES GASKET Carb Gasket - S&S Super G 29058-SSG
JAMES GASKET
$7.70A properly sealed carburetor is fundamental to consistent jetting and reliable engine performance. The JAMES GASKET Carb Gasket for S&S Super G carburetors eliminates fuel seepage and air leaks that compromise air-fuel ratio stability. This OEM-quality...09341613- SKU:
- 09341613
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- TYPE:
- CARBURETOR
- MOUNTING POSITION:
- AIR CLEANER TO CARBURETOR
- PRODUCT NAME:
- GASKET
- UNITS:
- 5 PACK
- MATERIAL:
- PAPER
- RIDING STYLE:
- STREET
- STYLE:
- AIR CLEANER
$7.70 -
On Sale
S&S CYCLE Top End Gasket Kit 90-9500
S&S CYCLE
MSRP: $203.95Now: $183.56Was: $203.95A quality top-end gasket kit is non-negotiable for maintaining compression integrity and preventing oil leakage in high-performance engines. The S&S Cycle 90-9500 delivers OEM-grade sealing across critical cylinder head surfaces, ensuring your engine...909500- SKU:
- 909500
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
MSRP: $203.95Now: $183.56Was: $203.95 -
On Sale
S&S CYCLE Top End Gasket Kit - 3-5/8" 90-9501
S&S CYCLE
MSRP: $205.95Now: $185.36Was: $205.95A properly sealed top end is non-negotiable for maintaining compression and preventing oil weeping on high-performance engines. The S&S Cycle Top End Gasket Kit ensures critical sealing surfaces stay protected across your engine's most demanding...909501- SKU:
- 909501
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- UNITS:
- KIT
MSRP: $205.95Now: $185.36Was: $205.95 -
On Sale
S&S CYCLE Top End Gasket - 3-5/8" - Big Twin 90-9502
S&S CYCLE
MSRP: $102.95Now: $92.66Was: $102.95A top-end gasket kit is essential for maintaining proper sealing and compression in your Big Twin engine—any failure here directly impacts performance and reliability. The S&S CYCLE Top End Gasket kit delivers OEM-quality sealing with layered steel head...909502- SKU:
- 909502
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE SIZE:
- 3,625'
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
MSRP: $102.95Now: $92.66Was: $102.95 -
On Sale
S&S CYCLE Top End Gasket - 4" - Big Twin 90-9503
S&S CYCLE
MSRP: $94.95Now: $85.46Was: $94.95A properly sealed top end is foundational to engine reliability and performance—factory gaskets degrade over time, leading to oil weeps, compression loss, and potential engine damage. The S&S Cycle Top End Gasket delivers OEM-quality sealing with...909503- SKU:
- 909503
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- FEATURES:
- FOR '84 - '99 SUPER STOCK S&S EVOLUTION BIG TWIN
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
MSRP: $94.95Now: $85.46Was: $94.95 -
On Sale
S&S CYCLE Top End Gasket - 3-7/8" - Twin Cam 90-9504
S&S CYCLE
MSRP: $137.95Now: $124.16Was: $137.95A proper top end gasket is non-negotiable for maintaining cylinder head integrity and preventing costly coolant and oil leaks. The S&S Cycle 3-7/8" gasket delivers the precision fit and material quality your Twin Cam 90 demands, ensuring a reliable seal...909504- SKU:
- 909504
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- BORE SIZE IMPERIAL:
- 3.875'
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- TYPE:
- TOP END
- FEATURES:
- FOR '99 - '06 SUPER STOCK S&S TWIN CAM
- PRODUCT NAME:
- GASKET KIT
MSRP: $137.95Now: $124.16Was: $137.95 -
On Sale
S&S CYCLE Top End Gasket - 4" - Twin Cam 90-9505
S&S CYCLE
MSRP: $106.95Now: $96.26Was: $106.95A quality top-end gasket is critical to maintaining compression integrity and preventing oil seepage in your Twin Cam engine. The S&S Cycle 4" gasket is engineered to exact OEM specifications and manufactured right here in the U.S.A., ensuring reliable...909505- SKU:
- 909505
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- FEATURES:
- FOR '99 - '06 SUPER STOCK S&S TWIN CAM
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
MSRP: $106.95Now: $96.26Was: $106.95 -
On Sale
S&S CYCLE Top End Gasket Kit - 3.5" 90-9507
S&S CYCLE
MSRP: $117.95Now: $106.16Was: $117.95A quality top-end gasket kit is essential for maintaining cylinder head integrity and preventing coolant or oil seepage that compromises engine performance. The S&S Cycle 90-9507 delivers OEM-equivalent sealing with precision-engineered gaskets designed...909507- SKU:
- 909507
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
MSRP: $117.95Now: $106.16Was: $117.95 -
On Sale
S&S CYCLE Rocker Box Gasket Kit 90-4091
S&S CYCLE
MSRP: $91.95Now: $82.76Was: $91.95A leaking rocker box gasket compromises engine sealing and can lead to oil contamination and performance degradation. This complete S&S Cycle gasket kit eliminates guesswork by providing all necessary gaskets and O-rings for both rocker boxes in one...904091- SKU:
- 904091
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- TYPE:
- ROCKER BOX
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
MSRP: $91.95Now: $82.76Was: $91.95 -
On Sale
S&S CYCLE Rocker Box Gasket Kit 90-4111
S&S CYCLE
MSRP: $71.95Now: $64.76Was: $71.95Rocker box gasket failure is one of the most common sources of oil leaks on Harley-Davidson engines, and even minor seepage compromises engine cleanliness and performance. The S&S Cycle 90-4111 kit eliminates guesswork by providing all gaskets and...904111- SKU:
- 904111
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
- FEATURES:
- FOR '99 - '17 TWIN CAM S&S ROCKER BOX
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
MSRP: $71.95Now: $64.76Was: $71.95 -
On Sale
S&S CYCLE Rocker Box Gasket Set - Shovelhead 90-4311
S&S CYCLE
MSRP: $65.05Now: $55.76Was: $65.05A leaking rocker box gasket will compromise your Shovelhead's oil integrity and engine reliability faster than you'd expect. This S&S Cycle complete gasket set eliminates guesswork by delivering OEM-quality sealing surfaces across both rocker boxes,...09341571- SKU:
- 09341571
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- FEATURES:
- FOR '66 - '84 SHOVELHEAD
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER COVER
- PRODUCT NAME:
- GASKET KIT
- UNITS:
- KIT
MSRP: $65.05Now: $55.76Was: $65.05Qty in Cart: 0Quantity:Price:MSRP: $65.05Now: $55.76Was: $65.05Subtotal: -
On Sale
S&S CYCLE U-Ring - 44-45 mm 16-0241
S&S CYCLE
MSRP: $43.00Now: $36.86Was: $43.00A properly sealed intake manifold is critical for consistent air delivery and maximum performance in forced-induction applications. The S&S CYCLE U-Ring ensures a reliable seal between your manifold and cylinder head, eliminating boost leaks that...09340665- SKU:
- 09340665
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- THICKNESS METRIC:
- 44 MM - 45 MM
- TYPE:
- INTAKE
- THICKNESS:
- 44 MM - 45 MM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- INTAKE MANIFOLD
- UNITS:
- EACH
MSRP: $43.00Now: $36.86Was: $43.00 -
On Sale
S&S CYCLE Base/Head Gaskets - Big Twin 90-1917
S&S CYCLE
MSRP: $112.95Now: $101.66Was: $112.95Big Twin engines demand gaskets that can withstand extreme combustion pressures and temperature cycling without compromise. S&S Cycle's base and head gaskets are engineered with premium materials and proven compounds specifically designed to prevent...09342105- SKU:
- 09342105
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- BORE SIZE:
- 3,500'
- RIDING STYLE:
- STREET
- THICKNESS:
- 0,81 MM (0,032')
- THICKNESS IMPERIAL:
- 0,032'
- BORE SIZE IMPERIAL:
- 3.500'
- TYPE:
- CYLINDER BASE
- UNITS:
- KIT
- MATERIAL:
- COPPER
- PRODUCT NAME:
- GASKET KIT
- THICKNESS METRIC:
- 0.81 MM
- TYPE:
- CYLINDER HEAD
MSRP: $112.95Now: $101.66Was: $112.95Qty in Cart: 0Quantity:Price:MSRP: $112.95Now: $101.66Was: $112.95Subtotal: -
On Sale
S&S CYCLE Rocker Box Gasket 90-4120
S&S CYCLE
MSRP: $43.00Now: $36.86Was: $43.00Proper rocker box sealing is critical to preventing oil leaks and maintaining engine reliability, especially when pairing OEM stock rocker boxes with high-performance S&S cylinder heads. This gasket set eliminates guesswork and fitment issues by...09344574- SKU:
- 09344574
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- LOWER
- TYPE:
- ROCKER BOX
- UNITS:
- KIT
MSRP: $43.00Now: $36.86Was: $43.00 -
On Sale
S&S CYCLE Cylinder Gasket Kit - 97/106" 910-0465
S&S CYCLE
MSRP: $108.10Now: $92.66Was: $108.10A fresh gasket kit is non-negotiable when rebuilding or refreshing your big-displacement Harley engine. Worn or degraded gaskets compromise compression, invite oil weeping, and undermine the reliability of your build. S&S Cycle's gasket kit for 97/106"...09345006- SKU:
- 09345006
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.927'
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
MSRP: $108.10Now: $92.66Was: $108.10 -
On Sale
S&S CYCLE Gaskets 3-5/8" (.045) 930-0091
S&S CYCLE
MSRP: $37.75Now: $32.36Was: $37.75A quality head gasket is non-negotiable for engine reliability—it's your first line of defense against compression loss, coolant leaks, and catastrophic failure. The S&S Cycle 3-5/8" gasket delivers the sealing integrity that high-performance engines...09345010- SKU:
- 09345010
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE IMPERIAL:
- 3.625'
- THICKNESS:
- 1,14 MM (0,045')
- THICKNESS IMPERIAL:
- 0.045'
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- GRAPHITE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- BORE SIZE:
- 3,625'
- THICKNESS METRIC:
- 1.14 MM
MSRP: $37.75Now: $32.36Was: $37.75 -
On Sale
S&S CYCLE Gaskets - 4-1/8" - STK 930-0102
S&S CYCLE
MSRP: $87.10Now: $74.66Was: $87.10A quality head gasket is the critical seal between your engine block and cylinder head—failure here means catastrophic damage. S&S Cycle's 4-1/8" gaskets deliver proven reliability through premium materials and precision engineering, ensuring your engine...09345014- SKU:
- 09345014
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- THICKNESS:
- 1,09 MM (0,043')
- THICKNESS METRIC:
- 1.09 MM
- MATERIAL:
- LAYERED STEEL
- TYPE:
- CYLINDER HEAD
- BORE SIZE:
- 4,125'
- BORE SIZE IMPERIAL:
- 4.125'
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,043'
- UNITS:
- PAIR
MSRP: $87.10Now: $74.66Was: $87.10 -
On Sale
S&S CYCLE Gaskets - 4-1/8" - SSW 930-0100
S&S CYCLE
MSRP: $37.75Now: $32.36Was: $37.75A quality head gasket is the foundation of engine reliability—it seals combustion pressure while withstanding extreme heat and cylinder pressure cycles. S&S Cycle's 4-1/8" gaskets are engineered with aramid fiber-reinforced graphite and a steel core to...09345015- SKU:
- 09345015
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE SIZE IMPERIAL:
- 4.125'
- MATERIAL:
- ARAMID FIBER
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- FEATURES:
- S&S BOLT PATTERN
- THICKNESS IMPERIAL:
- 0,043'
- THICKNESS METRIC:
- 1.09 MM
- BORE SIZE:
- 4,125'
- MATERIAL:
- STEEL
- TYPE:
- CYLINDER HEAD
- THICKNESS:
- 1,09 MM (0,043')
MSRP: $37.75Now: $32.36Was: $37.75
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.
