Contains a pair of 106 mm bore MLX Multi layer steel with stopper layer head gaskets, and a pair of Single Layer Steel (SLS) base gaskets. The gaskets are stainless steel with an Elastomer coating and embossed. The head gaskets have the MLX stopper center layer for high cylinder pressure applications and are .024″ thick and the base gaskets are single layer steel .012″ thick, have an elastomer coating and are embossed.