Genuine OEM BMW cylinder head stud, part number 11127603917. This stud is a vital component used to fasten the cylinder head securely to the engine block. It ensures the integrity of the combustion chamber by maintaining proper clamping force. The diagram shows this part as a threaded fastener used in the engine assembly. Manufactured from high-strength steel to withstand extreme temperatures and pressures within the engine. Genuine OEM parts provide the correct tensile strength and precise dimensions required for safe and reliable engine operation.