Performance ARP Head Stud Kit 4J series Engines

To prevent head lifting and gasket failures when running high boost, high power out of these engines. These are also reusable unlike the factory torque to yield bolts. Kit includes 18 head studs, nuts (12point), washers, assembly lubricant and Torque instructions/procedure.

Please note! head studs do require some minor machining to head to solve some clearance issues with rocker shaft. This work can be completed at most engine shops. We also offer this machining as an extra service.