Cometic C9891-030 EST Top End Gasket Kit for Harley-Davidson Big Twin 1984-1991

The Cometic C9891-030 EST (Extreme Sealing Technology) Top End Gasket Kit is engineered specifically for 1984-1991 Harley-Davidson Big Twin engines. This complete gasket kit features a .030" oversized head gasket to accommodate overbored cylinders, making it ideal for performance builds and engine rebuilds.

Key Features:

• .030" oversized MLS (Multi-Layer Steel) head gasket for precise bore compensation
• EST technology provides superior sealing and resistance to extreme temperatures
• Includes all necessary top end gaskets for complete engine reassembly
• Manufactured from premium materials for exceptional durability and longevity
• Designed for Evo Big Twin engines (1984-1991 models)
• AFM (Aluminum Foam Material) gaskets where applicable for optimal sealing

Cometic gaskets are known for their race-proven performance and reliability. The MLS head gasket construction provides multiple layers of stainless steel with elastomeric coatings that conform to imperfections in sealing surfaces, ensuring a reliable seal even under high-performance conditions. This kit includes all essential gaskets needed for top end service, eliminating the need to source individual components.