ARP Custom Age 625+ 11mm Head Studs for EJ DOHC Engines EJ Headers with a built/ported head

with a built/ported head

Pin Diameter: 23mm (

Coil bind @

with no alteration of the factory wiring loom required for the models listed below

0R and applied state-of-the-art technology to make it even better

ARP Custom Age 625+ 11mm Head Studs for EJ DOHC Engines EJ Headers with a built/ported headThis 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"