Genuine OEM Kia Cylinder Head Special Stud, part number 1153308756K. This specialized fastener is engineered to securely attach the cylinder head to the engine block, ensuring a tight seal and structural rigidity for the combustion chamber. It is installed within the cylinder head assembly, providing the necessary clamping force. Using genuine OEM cylinder head studs guarantees the correct material strength, thread pitch, and length, which are vital for preventing leaks, maintaining proper engine compression, and withstanding the extreme forces within the engine.