With performance
enthusiasts adding increasing amounts of turbo boost to diesel applications,
ARP® has provided an extra measure of security in the form of extra-strong
head studs manufactured from the firm’s proprietary Custom Age 625+®
material that has a minimum rating of 260,000 psi tensile strength. They are
engineered to provide the clamping force required to keep cylinder heads from
lifting due to exceptionally high combustion pressures.ARP® also offers head
stud kits made from ARP2000 (220,000 psi minimum) for the Dodge/Cummins plus
Chevy Duramax diesel, Ford 7.3L Powerstroke diesel, and 6.0L Powerstroke. The
stud kits include heat-treated chrome-moly steel nuts (12-point) and parallel
ground washers.The studs are manufactured in ARP’s Santa Paula, CA plant,
with threads rolled after heattreat to provide optimum fatigue strength. They
are centerless ground to assure perfect concentricity. The ends of the studs
are broached to acilitate easy installation. This feature also enables the cylinder
head to be removed in tight quarters.