Cometic 1884+ Harley-Davidson 3 13/16 Big Twin .010in Copper Base Gasket - 2 Pack

This is a 2-pack of Cometic 1884+ Big Twin copper base gaskets, sized at 3 13/16 inches and .010 inches undersize. These gaskets are built for Harley-Davidson Big Twin engines, commonly used when rebuilding or modifying the top end of the engine. The copper base offers good sealing properties for these applications.

Cometic uses a copper base material for these gaskets, which is known for its ability to conform to sealing surfaces and handle the pressures and temperatures found in a V-twin engine. The .010 inch undersize specification is important; it means these gaskets are slightly smaller than the standard bore size, which is often necessary when boring cylinders out to a specific measurement during an engine build. Using the correct gasket size is critical for proper compression and sealing.