The Corteco Cylinder Head Gasket Set - 135559 is a comprehensive kit of products designed for use on a car's cylinder head. It includes several essential components necessary for a complete cylinder head gasket replacement. The contents of the kit may vary depending on the specific make and model of the car, but typically includes items such as gaskets, seals, bolts, and other necessary hardware. These components are crucial for ensuring a proper seal and functioning of the cylinder head, which is a critical part of the engine. This kit is a convenient and cost-effective option for those in need of a cylinder head gasket replacement, as it includes all the necessary parts in one package.