Cometic C10037-030 MLS Head Gasket 3-13/16" Bore .030" Shovelhead Big Bore

The Cometic C10037-030 is a Multi-Layer Steel (MLS) cylinder head gasket designed for Harley-Davidson Shovelhead Big Bore engines. Engineered for 3-13/16" bore applications, this gasket features a .030" compressed thickness to deliver precise combustion sealing for big bore builds from 1966–1984.

Cometic's MLS construction uses multiple embossed layers of high-temperature coated and uncoated stainless steel, providing superior sealing performance under extreme combustion pressures. The active combustion seal on each layer ensures long-lasting, leak-free performance even in high-output engine builds.

Key Features:

• Construction: Multi-Layer Steel (MLS) — multiple embossed stainless steel layers
• Bore Size: 3-13/16" (3.8125")
• Compressed Thickness: .030"
• Application: Shovelhead Big Bore engines (1966–1984)
• Sold: As a pair
• High-temperature coatings provide a micro-seal against head and block surfaces
• Resistant to corrosion with excellent tensile and yield strength

Cometic's MLS head gaskets are a trusted choice for V-Twin engine builders seeking professional-grade sealing solutions for custom and performance Shovelhead applications.