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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REVOLUTION PERFORMANCE, LLC Gasket Kit - 113" - Twin Cam RP10085-030-HB
REVOLUTION PERFORMANCE, LLC
$89.95A quality gasket kit is fundamental to maintaining compression integrity and preventing fluid leaks in high-performance applications. The REVOLUTION PERFORMANCE, LLC Gasket Kit for 113" Twin Cam engines delivers OEM-grade sealing with the precision fit...09347157- SKU:
- 09347157
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit - 117" - Twin Cam RP9925-036-030
REVOLUTION PERFORMANCE, LLC
$89.95A quality gasket kit is essential for maintaining proper compression and preventing oil leaks in high-performance engines—especially in forced induction applications where seal integrity directly impacts reliability and power delivery. The REVOLUTION...09347160- SKU:
- 09347160
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit RP9926
REVOLUTION PERFORMANCE, LLC
$89.95A properly sealed engine is the foundation of reliable performance, and worn or degraded gaskets compromise compression, increase oil leakage, and invite coolant breaches that can derail your racing schedule or weekend build. The Revolution Performance...09347161- SKU:
- 09347161
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit - M8 RP10193HB027014
REVOLUTION PERFORMANCE, LLC
$89.95A quality gasket kit is foundational to engine reliability—it seals critical surfaces under extreme heat and pressure, preventing oil leaks and combustion blowby that compromise performance and longevity. The REVOLUTION PERFORMANCE M8 RP10193HB027014...09347162- SKU:
- 09347162
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit - 85"/92" RP9791
REVOLUTION PERFORMANCE, LLC
$89.95A complete gasket kit is fundamental to maintaining compression integrity and preventing fluid leakage across your engine's critical sealing points. Revolution Performance's RP9791 kit delivers OEM-equivalent sealing for 85" and 92" displacement engines,...09347163- SKU:
- 09347163
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE SIZE:
- 3-9/16'
- BORE SIZE IMPERIAL:
- 3-9/16'
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit - 100"/109" RP9993-030
REVOLUTION PERFORMANCE, LLC
$89.95A complete gasket kit is the foundation of a reliable high-displacement engine build. Whether you're assembling a fresh 100" or 109" big-block for street or strip duty, using quality OEM-spec gaskets ensures proper sealing across all critical engine...09347164- SKU:
- 09347164
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- BORE SIZE:
- 3-7/8'
- BORE SIZE IMPERIAL:
- 3-7/8'
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET KIT
$89.95 -
REVOLUTION PERFORMANCE, LLC Gasket Kit RP9791-040-020
REVOLUTION PERFORMANCE, LLC
$89.95A quality gasket kit is the foundation of any reliable engine assembly—proper sealing prevents fluid leaks, maintains compression integrity, and protects against contamination that can compromise performance. The Revolution Performance RP9791-040-020...09347165- SKU:
- 09347165
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$89.95Qty in Cart: 0Quantity:Price:$89.95Subtotal: -
DRAG SPECIALTIES Exhaust Gasket 01-0151
DRAG SPECIALTIES
$82.35A quality exhaust gasket is critical to maintaining a sealed, efficient exhaust system—any leakage compromises both performance and longevity. The DRAG Specialties 01-0151 provides a reliable, OEM-equivalent seal that prevents exhaust gases from escaping...09342557- SKU:
- 09342557
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- CROSSOVER
- TYPE:
- EXHAUST PORT
- RIDING STYLE:
- STREET
- UNITS:
- 10 PACK
$82.35 -
DRAG SPECIALTIES Exhaust Gasket 01-0149
DRAG SPECIALTIES
$106.04A degraded exhaust gasket compromises both performance and reliability—allowing exhaust gases to escape outside your intended flow path, reducing power and creating unwanted noise. This DRAG SPECIALTIES gasket seals your exhaust system properly, ensuring...09342558- SKU:
- 09342558
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- EXHAUST INTERCONNECT
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$106.04 -
DRAG SPECIALTIES Exhaust Gasket 01-0148
DRAG SPECIALTIES
$91.62A quality exhaust gasket is critical to maintaining a sealed exhaust system—even microscopic leaks lead to performance loss, increased emissions, and potential engine damage over time. The DRAG Specialties 01-0148 provides reliable sealing across...09342559- SKU:
- 09342559
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- TYPE:
- EXHAUST INTERCONNECT
- RIDING STYLE:
- STREET
$91.62 -
DRAG SPECIALTIES Exhaust Gasket - FXD I01-0150
DRAG SPECIALTIES
$91.62A failing exhaust gasket compromises both performance and reliability—allowing exhaust gases to escape before reaching your exhaust system and creating unwanted heat in the engine bay. The DRAG SPECIALTIES Exhaust Gasket (FXD I01-0150) delivers a...09342560- SKU:
- 09342560
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- TYPE:
- EXHAUST INTERCONNECT
$91.62 -
DRAG SPECIALTIES Rear Master Cylinder Gasket 17-0063A-HC3
DRAG SPECIALTIES
$46.30A deteriorating master cylinder gasket compromises your braking system's integrity, leading to fluid leakage, reduced brake pressure, and potential safety hazards. This OEM-equivalent replacement gasket restores a proper seal on your stock master...DS174493- SKU:
- DS174493
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MOUNTING POSITION:
- REAR
- TYPE:
- MASTER CYLINDER COVER
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
$46.30 -
DRAG SPECIALTIES Exhaust Gasket 01-0127
DRAG SPECIALTIES
$88.53A reliable exhaust gasket is essential for maintaining a proper seal between exhaust manifold and cylinder head—any leak will compromise engine efficiency and allow unwanted emissions escape. The DRAG SPECIALTIES 01-0127 is engineered to withstand...09342556- SKU:
- 09342556
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- EXHAUST PORT
- PRODUCT NAME:
- GASKET
- UNITS:
- 10 PACK
- RIDING STYLE:
- STREET
$88.53Qty in Cart: 0Quantity:Price:$88.53Subtotal: -
COMETIC S&S Rocker Box Gasket Kit C9155
COMETIC
$74.50Rocker box gaskets wear under constant thermal cycling and mechanical stress—premature failure leads to oil leakage, contamination, and potential engine damage. The COMETIC S&S Rocker Box Gasket Kit C9155 delivers OEM-quality sealing with premium...09341212- SKU:
- 09341212
- Availability:
- Ships Same Business Day
- Weight:
- 0.49 LBS
- FEATURES:
- FOR S&S DIE-CAST ROCKER BOXES
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- STEEL
- TYPE:
- ROCKER BOX
- MODEL:
- EST
- RIDING STYLE:
- STREET
- UNITS:
- KIT
$74.50 -
COMETIC Head Gasket - 4.125" - S&S Super Sidewinder - .045" C9934
COMETIC
$61.90A head gasket is the critical seal between your engine block and cylinder head—any failure here means catastrophic loss of compression, coolant mixing with oil, and complete engine shutdown. The COMETIC C9934 is engineered specifically for S&S Super...09340791- SKU:
- 09340791
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE IMPERIAL:
- 4.125'
- MATERIAL:
- VITON
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0,045'
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,14 MM (0,045')
- TYPE:
- CYLINDER HEAD
- MATERIAL:
- LAYERED STEEL
- BORE SIZE:
- 4,125'
- THICKNESS METRIC:
- 1.14 MM
- UNITS:
- PAIR
$61.90 -
COMETIC Manifold/Head Gasket - S&S C9223
COMETIC
$14.80A quality manifold/head gasket is critical for maintaining compression integrity and preventing exhaust leaks that compromise power output and efficiency. The COMETIC C9223 uses a proven Viton elastomer construction with stainless steel reinforcement to...09341661- SKU:
- 09341661
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- VITON
- UNITS:
- 4 PACK
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- SEAL
- TYPE:
- INTAKE MANIFOLD
$14.80 -
JAMES GASKET Top End Gasket Kit - S&S 17040-92-SS
JAMES GASKET
$121.95A top-end rebuild demands precision gaskets and seals that won't fail under combustion pressure and thermal cycling. JAMES GASKET delivers OEM-quality components engineered to maintain compression, prevent oil weeping, and ensure reliable engine...20112097- SKU:
- 20112097
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE IMPERIAL:
- 3.500'
- THICKNESS METRIC:
- 1.14 MM
- UNITS:
- KIT
- THICKNESS IMPERIAL:
- 0,045'
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
$121.95 -
JAMES GASKET Cylinder Base Gasket - S&S T124 JGI-16736-13
JAMES GASKET
$35.95A quality cylinder base gasket is critical to maintaining compression and preventing oil seepage in high-performance engines. The JAMES GASKET Cylinder Base Gasket for S&S T124 engines delivers reliable sealing under demanding conditions, ensuring your...09345979- SKU:
- 09345979
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- TYPE:
- CYLINDER BASE
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
$35.95Qty in Cart: 0Quantity:Price:$35.95Subtotal: -
JAMES GASKET Rocker Cover Kit - S&S 17042-92-SS
JAMES GASKET
$52.95A properly sealed rocker cover assembly is critical for maintaining crankcase ventilation and preventing oil leakage—two issues that compromise engine reliability and performance. The JAMES GASKET Rocker Cover Kit delivers precision-machined components...DS174501- SKU:
- DS174501
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
$52.95 -
JAMES GASKET Top End Gasket Kit - S&S 17040-04-SS
JAMES GASKET
$144.95A 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
$144.95
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.
