1The OE number is ARP 201?4302, suitable for E36 325i 5L 6 Cyl M50 S50US, S52US. 2Sufficient clamping force can prevent the cylinder head from lifting, and the bolts align the gasket and cylinder head. 3The installation of the hollow bolts ends makes the cylinder head easier to remove. 4The bolts are heat treated and have laminated threads, with strict quality control and quality assurance. 5Small size, easy to carry and store, convenient to use and with good performance.