Genuine OEM Volkswagen Cylinder Head, part number 028103351J. This cylinder head forms the top part of the engine's combustion chamber, housing the valves and spark plug (or injector). It is a fundamental component of the engine assembly. Manufactured from high-strength cast iron, it ensures durability and resistance to high temperatures and pressures. Genuine OEM cylinder heads are precision-engineered for optimal combustion, sealing, and valve train operation, ensuring reliable engine performance.