Genuine OEM Hyundai Cylinder Head Stud, part number 1153308285. This high-strength stud is a critical fastener responsible for securing the cylinder head to the engine block, ensuring a tight seal for combustion and coolant passages. It is designed to withstand extreme temperatures and pressures within the engine. Using a genuine OEM cylinder head stud ensures the correct material grade, thread pitch, and tensile strength, which are vital for maintaining engine compression and preventing head gasket failure.