COMETIC
Cometic Gaskets, Head Gaskets, and Seal Kits at JJ Motorsports
Cometic Gasket, founded in 1989 by Bob Gorman in the USA, is a leading manufacturer in the powersports and automotive industries, specializing in high-performance gaskets and sealing solutions. Starting from a small facility dedicated to powersports, Cometic has grown to provide innovative products that withstand extreme pressures and temperatures, catering to engine builders, racers, and enthusiasts worldwide.
At JJ Motorsports, we offer a wide range of Cometic products designed for reliable engine maintenance and upgrades. Harley-Davidson riders can enhance their setups with the durable Derby Seal Cover C10306F5 or the precise Head Gasket 3.937" x 0.036" for M8 models. For exhaust systems, the Muffler Gasket for M8/FXST/XL ensures a tight seal. We also carry options for other brands, such as the Top End Gasket Kit 68 mm for Honda and the comprehensive Top End Gasket Kit for Yamaha. Whether you're rebuilding an engine or preventing leaks, Cometic delivers compatible solutions for various vehicles. Explore our inventory to find the perfect fit for your needs.
Key features of Cometic products include Multi-Layer Steel (MLS) technology for superior durability, custom bore sizes and thicknesses for precise applications, high-temperature resistance to handle demanding conditions, and advanced materials that maintain compression and prevent failures. Shop now and secure your ride with Cometic's trusted quality!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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4.200 MLS Head Gasket .051 - SBC C5249-051
COMETIC
$92.35A quality head gasket is the seal between your engine block and cylinder head—get it wrong, and you're looking at coolant leaks, compression loss, and catastrophic engine damage. The 4.200 MLS Head...CAGC5249-051- SKU:
- CAGC5249-051
- Availability:
- Ships Same Business Day
- Weight:
- 0.87 LBS
- MFG Part #:
- C5249-051
$92.35 -
4.200 MLS Head Gasket .045 - SBC C5249-045
COMETIC
$92.35A quality head gasket is the foundation of a reliable, high-compression engine—this MLS gasket delivers the sealing integrity and durability that serious SBC builders demand. The multi-layered steel...CAGC5249-045- SKU:
- CAGC5249-045
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
- MFG Part #:
- C5249-045
$92.35 -
4.200 MLS Head Gasket .040 - SBC C5249-040
COMETIC
$87.95A quality head gasket is the foundation of any reliable engine build—it's your seal against compression loss, oil leakage, and coolant crossover. This 4.200" MLS gasket is engineered for Small Block...CAGC5249-040- SKU:
- CAGC5249-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.67 LBS
- MFG Part #:
- C5249-040
$87.95 -
4.200 MLS Head Gasket .030 - SBC C5249-030
COMETIC
$87.95A quality head gasket is non-negotiable for engine reliability and performance—it's the critical seal that prevents combustion gases and coolant from leaking into your oil system. The 4.200 MLS Head...CAGC5249-030- SKU:
- CAGC5249-030
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- MFG Part #:
- C5249-030
$87.95 -
4.165 MLS Head Gasket .066- SBC C5248-066
COMETIC
$121.04A properly sealed cylinder head is non-negotiable for engine reliability and performance. This MLS head gasket delivers the clamping force and thermal stability required to maintain compression and...CAGC5248-066- SKU:
- CAGC5248-066
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MFG Part #:
- C5248-066
$121.04 -
4.165 MLS Head Gasket .051 - SBC C5248-051
COMETIC
$92.35A properly sealed cylinder head is non-negotiable for engine reliability and performance—combustion chamber pressure leaks translate directly to lost horsepower and potential engine damage. This MLS...CAGC5248-051- SKU:
- CAGC5248-051
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- MFG Part #:
- C5248-051
$92.35 -
4.165 MLS Head Gasket .040 - SBC C5248-040
COMETIC
$87.95A quality head gasket is fundamental to engine reliability and performance—it's your seal against compression loss, coolant leaks, and catastrophic failure. The 4.165 MLS Head Gasket .040 delivers...CAGC5248-040- SKU:
- CAGC5248-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- MFG Part #:
- C5248-040
$87.95 -
4.165 MLS Head Gasket .030 - SBC C5248-030
COMETIC
$87.95A quality head gasket is fundamental to engine reliability—it seals combustion pressure and prevents coolant/oil crossover that compromises performance and longevity. The 4.165 MLS gasket delivers...CAGC5248-030- SKU:
- CAGC5248-030
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- MFG Part #:
- C5248-030
$87.95 -
4.165 MLS Head Gasket .027 - SBC C5248-027
COMETIC
$87.95A quality head gasket is the foundation of cylinder sealing integrity—without it, you're risking combustion blow-by, coolant leaks, and catastrophic engine failure. This 4.165 MLS gasket delivers the...CAGC5248-027- SKU:
- CAGC5248-027
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- MFG Part #:
- C5248-027
$87.95 -
4.125 MLS Head Gasket .030 - SBC C5247-030
COMETIC
$87.95A quality head gasket is fundamental to engine reliability—it seals combustion pressure and coolant flow while withstanding extreme temperatures and cylinder pressures. This MLS gasket delivers the...CAGC5247-030- SKU:
- CAGC5247-030
- Availability:
- Ships Same Business Day
- Weight:
- 0.57 LBS
- MFG Part #:
- C5247-030
$87.95 -
4.125 MLS Head Gasket .027 - SBC C5247-027
COMETIC
$87.95A quality head gasket is the critical seal between your cylinder head and block—failure here means catastrophic engine damage. This 4.125" MLS gasket is engineered for Small Block Chevy applications...CAGC5247-027- SKU:
- CAGC5247-027
- Availability:
- Ships Same Business Day
- Weight:
- 0.53 LBS
- MFG Part #:
- C5247-027
$87.95 -
4.100 MLS Head Gasket .080 - SBC C5246-080
COMETIC
$132.59A quality head gasket is non-negotiable for any small block Chevy build—it's your primary seal against combustion pressure and coolant leakage. The 4.100 MLS design delivers superior reliability over...CAGC5246-080- SKU:
- CAGC5246-080
- Availability:
- Ships Same Business Day
- Weight:
- 1.28 LBS
- MFG Part #:
- C5246-080
$132.59 -
4.100 MLS Head Gasket .060 - SBC C5246-060
COMETIC
$121.04A quality head gasket is the foundation of a reliable engine seal—compromise here and you're risking coolant leaks, combustion blowby, and catastrophic engine failure. This 4.100 MLS gasket delivers...CAGC5246-060- SKU:
- CAGC5246-060
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- MFG Part #:
- C5246-060
$121.04 -
4.100 MLS Head Gasket .040 - SBC C5246-040
COMETIC
$87.95A quality head gasket is non-negotiable for engine reliability and peak performance. This 4.100 MLS gasket delivers the compression sealing your Small Block Chevy needs without compromise, whether...CAGC5246-040- SKU:
- CAGC5246-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MFG Part #:
- C5246-040
$87.95 -
4.100 MLS Head Gasket .036 - SBC C5246-036
COMETIC
$87.95A quality head gasket is the foundation of a reliable, leak-free engine—and this 4.100 MLS gasket delivers the sealing integrity that serious SBC builders demand. Multi-layered steel construction...CAGC5246-036- SKU:
- CAGC5246-036
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- MFG Part #:
- C5246-036
$87.95 -
4.100 MLS Head Gasket .030 - SBC C5246-030
COMETIC
$87.95A quality head gasket is non-negotiable for any serious Small Block Chevy build—it's your first line of defense against blow-by, coolant leaks, and compression loss. The MLS (Multi-Layered Steel)...CAGC5246-030- SKU:
- CAGC5246-030
- Availability:
- Ships Same Business Day
- Weight:
- 0.58 LBS
- MFG Part #:
- C5246-030
$87.95Qty in Cart: 0Quantity:Price:$87.95Subtotal: -
4.100 MLS Head Gasket .027 - SBC C5246-027
COMETIC
$87.95A quality head gasket is fundamental to engine reliability and performance—it's your seal against compression loss, coolant leaks, and catastrophic engine failure. The 4.100 MLS Head Gasket .027 is...CAGC5246-027- SKU:
- CAGC5246-027
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MFG Part #:
- C5246-027
$87.95Qty in Cart: 0Quantity:Price:$87.95Subtotal: -
4.060 MLS Head Gasket .051 - SBC C5245-051
COMETIC
$92.35A quality head gasket is non-negotiable for engine reliability and peak performance. This MLS (Multi-Layered Steel) design provides superior sealing under high combustion pressures while maintaining...CAGC5245-051- SKU:
- CAGC5245-051
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- MFG Part #:
- C5245-051
$92.35Qty in Cart: 0Quantity:Price:$92.35Subtotal: -
4.060 MLS Head Gasket .036 - SBC C5245-036
COMETIC
$87.95A quality head gasket is non-negotiable for any Small Block Chevy engine running real power. The 4.060 MLS design seals under extreme combustion pressures while maintaining precise compression...CAGC5245-036- SKU:
- CAGC5245-036
- Availability:
- Ships Same Business Day
- Weight:
- 0.67 LBS
- MFG Part #:
- C5245-036
$87.95 -
4.060 MLS Head Gasket .030 - SBC C5245-030
COMETIC
$87.95A properly sealed cylinder head is non-negotiable for engine reliability and performance—blow-by and coolant leaks will tank your horsepower and damage your engine block. This MLS head gasket...CAGC5245-030- SKU:
- CAGC5245-030
- Availability:
- Ships Same Business Day
- Weight:
- 0.47 LBS
- MFG Part #:
- C5245-030
$87.95 -
MLS Exhaust Gaskets .030 SBC Brodix/All Pro C5040-030
COMETIC
$39.28Exhaust leaks at the manifold gasket cost you power, efficiency, and longevity—especially on a built small block running Brodix or All Pro heads. These MLS gaskets are engineered to seal consistently...CAGC5040-030- SKU:
- CAGC5040-030
- Availability:
- Ships Same Business Day
- Weight:
- 0.37 LBS
- MFG Part #:
- C5040-030
$39.28Qty in Cart: 0Quantity:Price:$39.28Subtotal: -
MLS Exhaust Gaskets .030 SBC w/Brodix/Dart 13degr C5039-030
COMETIC
$39.28A quality exhaust gasket is critical to maintaining a reliable seal between your headers and cylinder head—any leak will bleed horsepower and create exhaust noise that compromises performance. These...CAGC5039-030- SKU:
- CAGC5039-030
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- MFG Part #:
- C5039-030
$39.28 -
COMETIC Derby Seal Cover C10306F5
COMETIC
$23.20A derby seal cover protects critical internal engine components from contamination and moisture ingress, which directly impacts engine longevity and performance reliability. Whether you're running a...09347177- SKU:
- 09347177
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
$23.20Qty in Cart: 0Quantity:Price:$23.20Subtotal: -
COMETIC Head Gasket - 3.937" x 0.036" - M8 C10345-036
COMETIC
$86.05If you're running forced induction, high compression, or nitrous on your Milwaukee-8 engine, a standard head gasket won't cut it. The Cometic MLX Head Gasket delivers the combustion seal integrity...09347528- SKU:
- 09347528
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
$86.05 -
COMETIC Head Gasket - 4.320" x 0.040" - M8 C10336-040
COMETIC
$86.05If you're running forced induction, high compression, or nitrous on your Milwaukee-8, a stock head gasket won't survive the pressure spikes. The COMETIC MLX gasket is engineered specifically for...09347532- SKU:
- 09347532
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
$86.05Qty in Cart: 0Quantity:Price:$86.05Subtotal: -
COMETIC Muffler Gasket - M8/FXST/XL C10232
COMETIC
$41.95A compromised muffler gasket leads to exhaust leaks, lost horsepower, and excessive noise that undermines your bike's performance. The COMETIC C10232 muffler gasket seals your M8, FXST, or XL exhaust...09347810- SKU:
- 09347810
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
COMETIC Exhaust Header Gasket C10352
COMETIC
$20.95A failing exhaust header gasket compromises both performance and reliability, allowing exhaust gases to escape before they reach your downstream components. The COMETIC C10352 is engineered from...09347812- SKU:
- 09347812
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$20.95Qty in Cart: 0Quantity:Price:$20.95Subtotal: -
COMETIC Exhaust Header Gasket - Indian C10353
COMETIC
$41.95A failing exhaust header gasket compromises both performance and reliability, allowing combustion gases to escape before they reach your exhaust system and creating potential engine damage over time...09347813- SKU:
- 09347813
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$41.95Qty in Cart: 0Quantity:Price:$41.95Subtotal: -
COMETIC Head Gasket - 4.125" - .036" - MLX - Twin Cam C10358-036
COMETIC
$86.05If you're running a 4.125" big bore on your Twin Cam and pushing real power through forced induction, nitrous, or high compression, you need a head gasket engineered to handle the combustion...09347815- SKU:
- 09347815
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$86.05Qty in Cart: 0Quantity:Price:$86.05Subtotal: -
COMETIC Rocker Box Rebuild Gasket 88"/96"/103" with O-Rings and Tappet Gaskets - Twin Cam C10359
COMETIC
$61.90A failing rocker box gasket will compromise your Twin Cam's oil containment and top-end performance—leading to leaks, contamination, and costly engine damage. This complete Cometic rebuild kit...09347817- SKU:
- 09347817
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
$61.90 -
Ford 9in Rear Diff. Gskt .032 Thick AFM Material C5848-032
COMETIC
$20.14A proper differential cover gasket is critical for maintaining a sealed, leak-free differential housing—especially in high-performance applications where fluid integrity directly impacts gear life...CAGC5848-032- SKU:
- CAGC5848-032
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$20.14 -
4.165 MLS Head Gasket .036 - SBC C5248-036
COMETIC
$87.95A quality head gasket is fundamental to engine reliability—it's your seal against compression loss, coolant leaks, and catastrophic engine damage. This 4.165 MLS gasket is engineered for Small Block...CAGC5248-036- SKU:
- CAGC5248-036
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
$87.95 -
4.060 MLS Head Gasket .027 - SBC C5245-027
COMETIC
$87.95A quality head gasket is the foundation of a reliable, high-compression engine—it's where combustion integrity begins. This 4.060" MLS gasket is engineered specifically for Small Block Chevy...CAGC5245-027- SKU:
- CAGC5245-027
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
$87.95 -
4.200 MLX Head Gasket LH .052 GM LSX C5078-052
COMETIC
$113.09A proper head gasket is non-negotiable for engine reliability and peak performance. This MLX gasket is engineered to maintain a consistent seal under extreme combustion pressures, preventing coolant...CAGC5078-052- SKU:
- CAGC5078-052
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$113.09 -
4.200 MLX Head Gasket RH .052 GM LSX C5077-052
COMETIC
$113.09A head gasket failure can cost you race time, engine damage, and credibility. The 4.200 MLX Head Gasket RH .052 delivers reliable sealing under extreme combustion pressures, making it essential for...CAGC5077-052- SKU:
- CAGC5077-052
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$113.09 -
Oil Pan Gasket SBC 1-Piece Rubber 86-97 C5072
COMETIC
$40.46A failing oil pan gasket doesn't just leak—it compromises engine protection and leaves you stranded. This 1-piece rubber gasket seals your Small Block Chevy oil pan reliably, preventing oil loss and...CAGC5072- SKU:
- CAGC5072
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$40.46 -
Exhaust Header Gasket Set SBC w/Brodix -12 C15603-064
COMETIC
$33.01A quality exhaust header gasket set is critical to maintaining boost integrity and preventing exhaust leaks that rob power and create hot spots under the hood. Mismatched or deteriorated gaskets...CAGC15603-064- SKU:
- CAGC15603-064
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$33.01Qty in Cart: 0Quantity:Price:$33.01Subtotal: -
COMETIC Head Gasket - Standard - .040" C9984
COMETIC
$61.90A failing head gasket can compromise your engine's compression, cooling system integrity, and overall performance—and a quality replacement is non-negotiable for reliability. The COMETIC C9984 uses...09340794- SKU:
- 09340794
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- MATERIAL:
- LAYERED STEEL
- TYPE:
- CYLINDER HEAD
- THICKNESS IMPERIAL:
- 0,040'
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET
- THICKNESS METRIC:
- 1.02 MM
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- THICKNESS:
- 1,02 MM (0,040')
$61.90 -
COMETIC Complete Gasket Kit - FL/FLH C9966
COMETIC
$190.00A complete gasket failure can end your race day before it starts. The COMETIC C9966 kit eliminates guesswork by pairing multi-layer steel head gaskets with application-specific materials throughout...09340816- SKU:
- 09340816
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- RIDING STYLE:
- STREET
- BORE SIZE:
- 3,437'
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- TYPE:
- COMPLETE
- UNITS:
- KIT
- BORE SIZE IMPERIAL:
- 3.437'
- PRODUCT NAME:
- GASKET KIT
$190.00 -
COMETIC Trans Gasket - 5 Speed C9466
COMETIC
$86.05Transmission gasket failures lead to fluid leaks, loss of shift quality, and costly internal damage—often when you can least afford downtime. The COMETIC Trans Gasket C9466 eliminates guesswork with...09340821- SKU:
- 09340821
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- 5-SPEED
- UNITS:
- KIT
- RIDING STYLE:
- STREET
- TYPE:
- TRANSMISSION
$86.05Qty in Cart: 0Quantity:Price:$86.05Subtotal:
