This 153 tooth lightweight flywheel fits 1986 and newer small block Chevy engines, Has a cast in weight typical of externally balanced flywheel. Center thru hole 2.062 inch dia., Works with 10-1/2" Borg & Beck and diaphragm style pressure assemblies, Externally balanced to match the needs of 1986 and newer 1 piece rear main seal engines, Fits 602 and 604 crate engines.
