Cometic C9031 HD 340 .005" Copper Head Gasket

The Cometic C9031 is a .005-inch copper head gasket designed for Harley-Davidson 340cc engine applications. Cometic's copper head gaskets are precision-manufactured to deliver exceptional sealing performance, making them a preferred choice for high-performance engine builds and rebuilds.

Copper head gaskets are renowned for their superior conformability and heat conductivity, allowing them to seal even slightly irregular surfaces more effectively than multi-layer steel (MLS) alternatives. The .005" thickness of this gasket makes it ideal for applications where minimal compression ratio change is desired or where precise deck clearance specifications must be maintained.

Key Features:

• Material: Premium copper construction for superior sealing and heat resistance
• Thickness: .005 inches for precision fitment and minimal compression ratio impact
• Application: Designed for Harley-Davidson 340cc engine configurations
• Manufacturer Part Number: C9031
• Precision die-cut for exact OEM bore and bolt-hole placement
• Reusable with proper preparation (annealing recommended between uses)
• Excellent resistance to high temperatures and combustion pressures

Cometic Gasket is an industry leader in aftermarket and performance gasket technology, manufacturing products to OEM and beyond-OEM tolerances. The C9031 copper head gasket is a reliable solution for engine builders seeking a proven, high-integrity seal.