Genuine OEM Porsche Cylinder Head Gasket, part number 9A210413901. This essential gasket is responsible for sealing the combustion chambers, preventing leaks of combustion gases, and also sealing the coolant and oil passages within the engine block and cylinder head. Its integrity is vital for maintaining compression and preventing fluid contamination. Genuine OEM gaskets are manufactured with precise material specifications and tolerances to ensure a perfect seal under extreme engine operating conditions, preventing costly engine damage.