Cometic C9033 Copper Head Gasket 1340 Evolution 3.5" Bore .043" 2-Pack

The Cometic C9033 is a premium copper cylinder head gasket designed specifically for Harley-Davidson 1340 Evolution Big Twin engines with a 3.5-inch bore. This builder's pack includes two gaskets, making it perfect for complete engine rebuilds or keeping a spare on hand.

Key Features:

• 3.5-inch (3.500") bore diameter for custom and big bore applications
• .043-inch compressed thickness provides optimal sealing and compression control
• Constructed from 99.9% pure C110 oxygen-free copper for superior thermal conductivity
• Copper construction offers excellent conformability to imperfect sealing surfaces
• Includes two head gaskets for complete engine service
• Compatible with 1340cc Evolution engines from 1984-1999

Cometic uses pure copper that is tested for uniform flatness to ensure the best possible seal between the cylinder head and engine block. The malleable nature of copper allows these gaskets to conform to minor surface irregularities, making them ideal for high-performance and racing applications. O-ringing is recommended for maximum sealing performance in extreme conditions.