This assembled cylinder head kit fits Westinghouse Generator WGen6000, WGen7500DF, WGen7500DFc, WGen9500, WGen9500c, WGen9500DF, WGen9500DFc. Replaces Westinghouse WGen9500 cylinder head assy and Powerhorse 9000ES generator cylinder head kit.The kits contains all parts you need, including cylinder head,valve cover, valves,valve spring,spark plug,insulator, head gasket, valve cover gasket, carburetor gasket set, muffler gasket, all bolts and nuts and others as picture.