Cometic C9691-030 HD Stainless Steel Head Gasket 3.670" Bore EVO .030" 2-Pack

The Cometic C9691-030 is a high-performance stainless steel head gasket set designed specifically for Harley-Davidson Evolution motors. This 2-pack features a 3.670-inch (3 5/8") bore diameter with a .030-inch compressed thickness, engineered to provide exceptional sealing and durability in high-compression applications.

Key Features:

• Heavy-duty multi-layer steel (MLS) construction with stainless steel core for superior strength and heat resistance
• 3.670-inch bore diameter perfectly sized for EVO Big Twin engines
• .030-inch compressed gasket thickness for precise compression control
• Includes 2 head gaskets for complete top-end rebuild
• Advanced MLS design accommodates thermal expansion and engine movement
• Superior sealing performance compared to traditional composite gaskets
• Ideal for performance builds, high-compression applications, and engine rebuilds

Cometic's multi-layer stainless steel gaskets feature embossed sealing beads that provide maximum sealing surface pressure while maintaining gasket integrity under extreme conditions. These gaskets are specifically engineered for Harley-Davidson Evolution engines and are a direct replacement for OEM head gaskets in performance applications.