Genuine OEM Hyundai Cylinder Head Dowel Pin, part number 1430304121. This precision-machined pin is essential for accurately aligning various components within the cylinder head assembly, such as the cylinder head itself to the engine block, or internal components like camshaft bearing caps. Proper alignment is crucial for correct sealing, even torque distribution, and preventing premature wear. It is installed within the cylinder head structure. Using a genuine OEM dowel pin ensures the exact dimensions and material strength required for precise alignment and long-term engine reliability.