Cylinder heads are an integral component of internal combustion engine. High performance cylinder heads that are used in automobiles these days are basically the castings which houses spark plugs
, valves, fuel injectors
and support the different parts of cooling system. Raw materials used for making cylinder heads are aluminum, iron, nickel alloys, copper, titanium, stainless steel, zirconium, carbon steel, brass, bronze and galvanized steel. The chief function of cylinder head is to help the head gasket seal the cylinders properly so that they are able to build enough compression for engine operation. Burgess Norton, Dana Corp, Elgin Industries, Federal Mogul Corporation, Hastings Manufacturing Company, Kolbenschmdt Pierburg AG, Mahle GMBH, Daimler Chrysler, Ford Motor Company and General Motors are the largest manufacturing companies of cylinder heads in the world.