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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COMETIC Base Gasket - 4" - .010" C9937
COMETIC
$33.55A head gasket failure can sideline your engine and drain your wallet. The COMETIC Base Gasket delivers reliable sealing across demanding racing conditions, high-boost applications, and variable...09340777- SKU:
- 09340777
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.25 MM
- PRODUCT NAME:
- GASKET
- UNITS:
- PAIR
- BORE SIZE IMPERIAL:
- 4.000'
- STYLE:
- STANDARD
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- MATERIAL:
- STEEL
- TYPE:
- CYLINDER BASE
$33.55 -
COMETIC Base Gasket - Evo - .010" C9101
COMETIC
$33.55A quality head gasket is non-negotiable if you're chasing reliable power and ring seal integrity on your Evo platform. The COMETIC Base Gasket delivers proven MLS construction with Load Control...09340773- SKU:
- 09340773
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- RIDING STYLE:
- STREET
- MATERIAL:
- STEEL
- THICKNESS METRIC:
- 0.25 MM
- TYPE:
- CYLINDER BASE
- PRODUCT NAME:
- GASKET
- STYLE:
- STANDARD
- UNITS:
- PAIR
$33.55 -
COMETIC Base Gasket - .010" - XL C9100
COMETIC
$33.55A properly sealed combustion chamber is non-negotiable for consistent power output and engine reliability. The COMETIC Base Gasket delivers precision multi-layer steel construction with strategically...09340772- SKU:
- 09340772
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- THICKNESS:
- 0,25 MM (0,010')
- THICKNESS IMPERIAL:
- 0,010'
- MATERIAL:
- RUBBER
- MATERIAL:
- STEEL
- THICKNESS METRIC:
- 0.25 MM
- TYPE:
- CYLINDER BASE
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- STYLE:
- STANDARD
$33.55 -
COMETIC Complete Gasket Kit - .030" - 4/5 Speed C9847F
COMETIC
$356.95A complete gasket kit is foundational to engine reliability—one failed gasket can compromise your entire build. The Cometic C9847F delivers the precision sealing you need across all critical engine...09340801- SKU:
- 09340801
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- MATERIAL:
- STEEL
- TYPE:
- COMPLETE
- UNITS:
- KIT
- THICKNESS IMPERIAL:
- 0,030'
- BORE SIZE:
- 3,500'
- BORE SIZE IMPERIAL:
- 3.500'
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 0.76 MM
$356.95 -
COMETIC Complete Gasket Kit - .030" C9848F
COMETIC
$356.95A complete gasket kit eliminates the guesswork when rebuilding or refreshing your engine—you get every seal you need in one package, eliminating multiple orders and potential fitment issues...09340802- SKU:
- 09340802
- Availability:
- Ships Same Business Day
- Weight:
- 1.70 LBS
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,030'
- MATERIAL:
- STEEL
- MATERIAL:
- VITON
- THICKNESS METRIC:
- 0.76 MM
- TYPE:
- COMPLETE
- BORE SIZE:
- 3,500'
- MATERIAL:
- AFM (ALUMINUM FOAM MATERIAL)
- PRODUCT NAME:
- GASKET KIT
- BORE SIZE IMPERIAL:
- 3.500'
- UNITS:
- KIT
$356.95 -
COMETIC Head Gasket - .060 - MLS Evo C9180
COMETIC
$90.25A quality head gasket is fundamental to engine reliability—it's your seal against catastrophic coolant and oil leaks, combustion blow-by, and loss of compression. The COMETIC MLS design distributes...09341227- SKU:
- 09341227
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- BORE SIZE:
- 3,750'
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- BORE SIZE IMPERIAL:
- 3.750'
- MATERIAL:
- LAYERED STEEL
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- CYLINDER HEAD
- UNITS:
- PAIR
$90.25Qty in Cart: 0Quantity:Price:$90.25Subtotal: -
COMETIC Derby Cover Gasket - 3 Hole C9183F5
COMETIC
$21.30A quality derby cover gasket is essential for maintaining a reliable seal on your Harley Davidson's engine, preventing oil seepage and protecting internal components from contamination. Cometic's...09341228- SKU:
- 09341228
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- THICKNESS:
- 1,52 MM (0,060')
- TYPE:
- CLUTCH COVER
- TYPE:
- DERBY COVER
- PRODUCT NAME:
- GASKET
- THICKNESS IMPERIAL:
- 0.060'
- MATERIAL:
- VITON
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 1.52 MM
- UNITS:
- 5 PACK
$21.30 -
COMETIC Wet Clutch Seal C9260
COMETIC
$9.50Wet clutch seals are critical to maintaining hydraulic integrity and preventing fluid loss in your transmission or engine case. A failed or degraded seal compromises performance, increases...09350162- SKU:
- 09350162
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- RIDING STYLE:
- STREET
- APPLICATION:
- INNER PRIMARY
- MATERIAL:
- VITON
- UNITS:
- 5 PACK
- PRODUCT NAME:
- SEAL
$9.50 -
COMETIC Output Gear Seal C9200F1
COMETIC
$11.95Transmission output seals are critical to maintaining hydraulic pressure and preventing fluid contamination in your Twin Cam drivetrain. A compromised seal leads to slow leaks, loss of lubrication,...09346322- SKU:
- 09346322
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- SEAL
- TYPE:
- OUTPUT GEAR
- UNITS:
- EACH
- RIDING STYLE:
- STREET
$11.95 -
COMETIC Top End Gasket Kit - M8 C10219
COMETIC
$240.40A failing top end gasket kit can compromise your engine's reliability and performance, especially under high boost or sustained RPM. The COMETIC EST (Extreme Sealing Technology) gasket kit eliminates...09346324- SKU:
- 09346324
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- BORE SIZE:
- 4,075'
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- BORE SIZE IMPERIAL:
- 4.075'
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
$240.40 -
COMETIC Cylinder Base Gasket C9568-1
COMETIC
$4.95A properly sealed combustion chamber is non-negotiable for engine reliability and power output. The COMETIC Cylinder Base Gasket C9568-1 uses multi-layer steel construction with load control...09344712- SKU:
- 09344712
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MOUNTING POSITION:
- REAR
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- 0,031'
- PRODUCT NAME:
- GASKET
- TYPE:
- CYLINDER BASE
- MATERIAL:
- FIBER
- THICKNESS METRIC:
- 0.79 MM
- UNITS:
- EACH
$4.95 -
COMETIC Rocker Cover Gasket C9602-2
COMETIC
$5.95A compromised rocker cover gasket leads to oil seepage, visible leaks on your engine bay, and potential contamination of spark plug wells. The COMETIC Rocker Cover Gasket C9602-2 delivers a reliable...09344714- SKU:
- 09344714
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET
- MATERIAL:
- FIBER
- TYPE:
- ROCKER COVER
- UNITS:
- PAIR
$5.95Qty in Cart: 0Quantity:Price:$5.95Subtotal: -
COMETIC Top End Gasket Set - Kawasaki C3284-EST
COMETIC
$151.95A quality gasket set is foundational to engine reliability and performance—especially when running high compression or forced induction. The COMETIC C3284-EST uses multi-layered steel construction...09344135- SKU:
- 09344135
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE SIZE METRIC:
- 85.00 MM
- PRODUCT NAME:
- GASKET KIT
$151.95Qty in Cart: 0Quantity:Price:$151.95Subtotal: -
COMETIC Bottom End Gasket Set - Honda C3322
COMETIC
$38.95A quality bottom end gasket set is non-negotiable when rebuilding or refreshing your engine—cheap seals lead to oil leaks, contamination, and catastrophic failures. The COMETIC C3322 delivers...09344143- SKU:
- 09344143
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- MODEL:
- HI-PERFORMANCE
- UNITS:
- KIT
- BORE SIZE METRIC:
- 71.00 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- BOTTOM END
$38.95 -
COMETIC Top End Gasket - 4" - S&S C9917
COMETIC
$142.75A quality top-end gasket kit is non-negotiable for maintaining combustion integrity and preventing coolant or oil seepage in high-performance engines. Cometic's EST gasket design uses embossed...09340767- SKU:
- 09340767
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- GASKET KIT
- MATERIAL:
- RUBBER
- UNITS:
- KIT
- BORE SIZE:
- 4,000'
- BORE SIZE IMPERIAL:
- 4.000'
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
$142.75 -
4.060 MLS Head Gasket .036 - SBF C5512-036
COMETIC
$87.95A quality head gasket is critical to maintaining cylinder pressure and preventing coolant or oil seepage in high-performance applications. This 4.060" MLS gasket delivers the sealing integrity you...CAGC5512-036- SKU:
- CAGC5512-036
- Availability:
- Ships Same Business Day
- Weight:
- 1.63 LBS
$87.95 -
4.080 MLS Head Gasket .027 - SBC Vortec C5474-027
COMETIC
$87.95A quality head gasket is the foundation of engine reliability—it seals combustion pressure and prevents coolant/oil cross-contamination that can lead to catastrophic failure. This 4.080" MLS gasket...CAGC5474-027- SKU:
- CAGC5474-027
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$87.95 -
4.080 MLS Head Gasket .060 - SBF C5513-060
COMETIC
$121.04A quality head gasket is critical to maintaining compression, preventing coolant leakage, and ensuring reliable engine performance under high boost or sustained RPM. This 4.080 MLS gasket is...CAGC5513-060- SKU:
- CAGC5513-060
- Availability:
- Ships Same Business Day
- Weight:
- 1.03 LBS
- MFG Part #:
- C5513-060
$121.04 -
4.080 MLS Head Gasket .040 - SBC Vortec C5474-040
COMETIC
$87.95A quality head gasket is non-negotiable in any high-performance build—it's your first line of defense against combustion leakage, oil mixing, and catastrophic engine failure. This MLS (Multi-Layered...CAGC5474-040- SKU:
- CAGC5474-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MFG Part #:
- C5474-040
$87.95Qty in Cart: 0Quantity:Price:$87.95Subtotal: -
4.200 MLS Head Gasket .040 - SBC BRO DB2000 C5408-040
COMETIC
$85.48A quality head gasket is the foundation of a reliable engine seal—any compromise here means potential coolant leaks, combustion blow-by, and catastrophic failure. This 4.200" MLS gasket is engineered...CAGC5408-040- SKU:
- CAGC5408-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- MFG Part #:
- C5408-040
$85.48 -
4.135 MLS Head Gasket .040 - SBC Brodix C5401-040
COMETIC
$85.48A quality head gasket is the foundation of cylinder sealing integrity—without it, you're risking compression loss, coolant leakage, and catastrophic engine failure. The Brodix C5401-040 MLS head...CAGC5401-040- SKU:
- CAGC5401-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.73 LBS
- MFG Part #:
- C5401-040
$85.48 -
Rear Main Seal - Ford 351 (#85339) C5391
COMETIC
$79.04A failing rear main seal is one of the most common causes of oil leakage in classic Small Block Ford engines—and it's a leak that only gets worse with time. This OEM-spec replacement seal restores...CAGC5391- SKU:
- CAGC5391
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- MFG Part #:
- C5391
$79.04 -
Rear Main Seal - Ford 351W Block w/ 302 crank C5384
COMETIC
$112.09A leaking rear main seal is a silent performance killer, robbing you of oil pressure and creating messy driveways. If you're running a 351W block with a 302 crank, this OEM-equivalent seal is your...CAGC5384- SKU:
- CAGC5384
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- MFG Part #:
- C5384
$112.09 -
3.830 MLS Head Gasket .027 - Ford 2300 C5369-027
COMETIC
$75.97A head gasket failure can quickly turn a promising run into a costly rebuild. The 3.830 MLS Head Gasket .027 for Ford 2300 engines delivers the sealing integrity and durability you need to maintain...CAGC5369-027- SKU:
- CAGC5369-027
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- MFG Part #:
- C5369-027
$75.97 -
4.180 MLS RH Head Gasket .040 - SBF Yates C5365-040
COMETIC
$87.95A proper head gasket seal is non-negotiable for engine reliability and performance—any compromise here leads to compression loss, coolant leaks, and catastrophic failure. The Yates C5365-040 MLS...CAGC5365-040- SKU:
- CAGC5365-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- MFG Part #:
- C5365-040
$87.95 -
4.100 MLS Head Gasket .040 - SBF Yates RH C5358-040
COMETIC
$87.95A quality head gasket is the critical seal between your cylinder head and block—any compromise here means potential coolant leaks, combustion blow-by, and catastrophic engine damage. The Yates 4.100...CAGC5358-040- SKU:
- CAGC5358-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- MFG Part #:
- C5358-040
$87.95 -
4.165 MLS Head Gasket .040 - SBC SB2 C5323-040
COMETIC
$87.95A quality head gasket is the critical seal between your cylinder head and block—get it wrong, and you're looking at coolant leaks, compression loss, and catastrophic engine failure. This 4.165" MLS...CAGC5323-040- SKU:
- CAGC5323-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- MFG Part #:
- C5323-040
$87.95 -
4.125 MLS Head Gasket .060 - SBC C5247-060
COMETIC
$121.04A quality head gasket is the foundation of cylinder seal integrity—choose the wrong one, and you're risking blow-by, coolant leaks, and catastrophic engine failure. This 4.125 MLS gasket is...CAGC5247-060- SKU:
- CAGC5247-060
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- MFG Part #:
- C5247-060
$121.04 -
4.125 MLS Head Gasket .040 - SBC C5247-040
COMETIC
$87.95A quality head gasket is non-negotiable for engine durability and peak performance. This 4.125" MLS gasket delivers reliable sealing under high combustion pressures, preventing coolant and oil...CAGC5247-040- SKU:
- CAGC5247-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- MFG Part #:
- C5247-040
$87.95 -
4.060 MLS Head Gasket .040 - SBC C5245-040
COMETIC
$87.95A proper head gasket is non-negotiable for engine reliability and performance. This 4.060 MLS gasket delivers the sealing integrity needed for high-compression Small Block Chevy builds, whether...CAGC5245-040- SKU:
- CAGC5245-040
- Availability:
- Ships Same Business Day
- Weight:
- 0.79 LBS
- MFG Part #:
- C5245-040
$87.95
