12366984 - GM Composition Cylinder Head Gasket - Big Block Chevy - Gen V & VI - (1 Per Package)

This new head gasket is used with all Gen V & Gen VI 502ci big-block Chevrolet design engines with cast iron heads. This gasket is the same as production, except it has an additional water hole opened for improved cooling of the siamesed cylinder walls of the 502 engine. The compressed thickness is .041". There are 2 gaskets in this kit, a left and a right hand gasket. Technical Note: This gasket is not to be used with aluminum cylinder heads. 1 per package