Thread Size M12x1,5x200. Elring Cylinder Head Bolt Set. Why Choose Elring?. BMW: 11 12 7 812 925 BMW: 11 12 8 511 621 BMW: 11 12 8 511 621 (14x) BMW: 11 12 8 513 130. Bolt Head-/Nut Design Male Torx. Check your vehicle's specifications match the compatibility list below.
