Cometic Engine Cylinder Case Base Gasket

Cometic Engine Cylinder Case Base Gaskets: Precision Sealing From the Bottom Up

When rebuilding or modifying a high-performance engine, the cylinder case base gasket is one of the most consequential seals in the entire assembly. It bridges the cylinder jug and the crankcase, containing combustion gases, oil mist, and coolant under relentless mechanical stress. Cometic Gasket — a name synonymous with precision sealing across motorsports — brings that same engineering rigor to its Engine Cylinder Case Base Gasket lineup, ensuring a reliable foundation for every build.

A Brand Built for Extreme Conditions

Cometic was launched in 1989 by four partners, including current Founder and CEO Bob Gorman, and was originally dedicated exclusively to the powersports industry. That heritage is evident in every cylinder case base gasket they produce. Today's lightweight engines are producing more horsepower, higher cylinder pressures, clamp loads, and extreme temperatures — and Cometic's commitment is to provide innovative, quality gaskets that maximize engine power and performance.

Material Technology That Sets Cometic Apart

What makes Cometic's cylinder case base gaskets stand out is the deliberate selection of materials engineered for specific sealing environments. Cometic offers cylinder base gaskets in rubber coated steel and rubber coated stainless variants, available in multiple compressed thicknesses such as .010", .012", and .014" — giving builders the ability to fine-tune deck height, compression ratio, and squish clearance with real precision.

Whether the situation calls for the latest in advanced technology like MLS (Multi-Layer Steel) or a synthetic blend such as Aramid Fiber, Cometic finds a solution. The rubber coating on their steel and stainless base gaskets conforms to minor surface irregularities, providing a reliable, leak-free seal without the need for additional sealants on properly prepared surfaces. Engineers analyze the environment in which the gasket will perform, select the proper material, and apply the appropriate technology to offer the best-performing gaskets available in today's marketplace.

Coverage Across Powersports Platforms

Cometic Gasket supplies hi-performance gaskets for a variety of motorsports markets: ATV, Drag Race, Domestic Automotive, Harley-Davidson®, MX/Dirt, Off-Road, PWC, Road Race, Snowmobile, Sport Compact, and Street. Their cylinder case base gasket catalog reflects this breadth — covering well-known platforms like Kawasaki Jet Ski (STX, Ultra, and SX-R series) and Harley-Davidson Twin Cam engines, among others. This wide vehicle coverage means builders working on anything from a personal watercraft to a V-twin cruiser can find an application-specific fit rather than a generic substitute.

In-House Development and American Manufacturing

Cometic stays on the forefront of gasket design technology by utilizing in-house dynamometers and engine assembly rooms to bring its distributors, retailers, and ultimately the end-user the most reliable gaskets available today. Cometic's gaskets are proudly made in the USA with materials manufactured on American soil. For enthusiasts and professional builders alike, that traceability and quality control matters — especially in a component as critical as the cylinder base seal, where a failure can mean a costly teardown.

Whether you are chasing precise compression targets on a big-bore kit or simply replacing worn seals during a top-end refresh, Cometic's cylinder case base gaskets deliver the material quality, dimensional accuracy, and application-specific engineering that demanding builds require. Browse the full selection below to find the right gasket for your engine.