ARP Custom Age 625+ 11mm Head Studs for EJ DOHC Engines

This stud kit is the strongest ARP material with no modifications needed to block or heads. Outfront recommends this stud kit from 400-600HP range. Allen socket head for easy installation. The kit includes washers and nuts, and the studs. They are made from a high strength, super-alloy called custom age 625+.  Typical tensile strength is 260-280ksi. Typical shank diameter .361"