Premium Payen brand conversion set for A-Plus engines with 11-bolt timing cover and no tappet covers. The "conversion" gasket set is the English name for the bottom-end gasket set, which includes all of the gaskets below the head gasket. Does not include LUF10005 black or 13H2934 red rear main oil seal, please order separately. It takes a head set and a conversion set for a full engine rebuild.