This gasket set is compatible with LS1, LS6, LQ4, LQ9, 4.8L, 5.3L, 5.7L, and 6.0L engines.The kit includes one Gen III valley cover gasket (part number 12558178), two LS1/LS2/LS3 header gaskets, one LS oil pan gasket, two LS water pump gaskets, one LS front cover gasket, two LS valve cover gaskets, one LS damper seal, one LS rear cover gasket, one rear main seal, four water crossover/block off gaskets (part number 12551933), two knock grommets (part number 12558177), and two multi-layer steel (MLS) head gaskets designed for LS9 engines.These MLS head gaskets have a 4.100 inch bore and 0.055 inch compressed thickness and are compatible with LS1, LS6, LS2, LS3, LQ4, LQ9, and 4.8L/5.3L/6.0L engines.The kit does not include intake manifold gaskets.