Cometic Top End Gasket Kit for Honda, 78 mm (C3133-EST)

The Cometic C3133-EST Top End Gasket Kit is designed for Honda 4-stroke engines requiring dependable sealing during top-end service or rebuilds. This complete kit includes the correct base gasket, head gasket, cylinder O-rings, rocker gasket, and other application-specific O-rings or seals needed for top-end removal and installation. Built for high-output naturally aspirated and boosted engines, the kit supports reliable sealing under demanding operating conditions.
The multi-layer steel (MLS) head gasket uses embossed stainless-steel layers with a proprietary Viton rubber coating. This construction promotes even torque distribution across the gasket sealing surface, helping reduce cylinder-bore distortion and support improved piston-ring sealing. The gasket material also helps draw heat away from the combustion ring and distribute it evenly across the gasket surface, reducing hot spots and helping prevent gasket failure.
Cometic’s Extreme Sealing Technology (EST) combines embossed stainless-steel head, base, and rocker gaskets with a specialized rubber coating for consistent sealing performance. The C3133-EST is engineered to meet the demands of modern high-horsepower, high-cylinder-pressure Honda engines while providing the components needed for a thorough top-end service. Made in the USA, this 78 mm gasket kit is a practical choice for performance-focused engine maintenance and rebuild applications.

Features:

• Application: Designed for Honda 4-stroke top-end service and rebuilds

• Kit Contents: Includes base gasket, head gasket, cylinder O-rings, rocker gasket, and required top-end seals

• Head Gasket Design: Multi-layer steel construction with embossed outer layers and Viton rubber coating

• Sealing Performance: Promotes even torque loading, reduced bore distortion, and improved piston-ring sealing

• Extreme Sealing Technology: Uses embossed stainless-steel gaskets covered with proprietary rubber material

• Heat Management: Helps dissipate combustion heat evenly across the gasket surface to reduce hot spots

• Performance Use: Built for high-output naturally aspirated and boosted engines

• Manufacturing: Made in the USA

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