Genuine OEM Toyota Engine Cylinder Head Gasket, part number 1111537071. This gasket creates a seal between the engine cylinder head and the engine block, preventing combustion gases, coolant, and oil from leaking between these components. It is a critical seal for maintaining engine compression and preventing internal leaks. Genuine OEM gaskets are made from high-quality materials designed to withstand extreme temperatures and pressures, ensuring a reliable seal for engine longevity.