Genuine OEM Volkswagen Cylinder Head, part number 028103351H. This component forms the upper seal for the combustion chambers, housing the valves, camshafts, and spark plugs. It is critical for engine compression and proper valve operation. Positioned at the top of the engine block, it seals the cylinders. Constructed from robust cast iron to withstand high temperatures and pressures. Genuine OEM ensures exact tolerances for proper sealing and valve timing, crucial for engine performance and longevity.