Are you looking to overcome head gasket failures? Performance fastener industry leader Automotive Racing Products. Manufactures heavy-duty diesel head studs that will help to reduce or eliminate head gasket failures. They provide the clamping force required to keep cylinder heads from lifting due to higher combustion pressures. Diesel head stud is made from ARP’s proprietary ARP2000 material. This metal is tensile strength rated at 220,000 psi. In addition to phenomenal temperature stability, ARP2000 has excellent notch toughness. Ultra-Torque Fastener Assembly Lubricant is Included with this kit. Diesel head studs are manufactured in ARP’s Santa Paula, CA plant from proprietary. 2000 material, with threads rolled after heat-treat to provide optimum fatigue strength. Bolts are centerless ground to assure perfect concentricity. The ends of the arp bolts head studs are broached to facilitate easy installation. This feature also enables the cylinder head to be removed in tight quarters. Also included in each. Bolt kit are heat-treated, chrome-moly steel 12-point nuts and parallel-ground washers. Bolts are black oxide finished for extra durability. In order to ensure optimum quality control for their head studs, bolts, and other products. Has grown to be exceptionally self-reliant and now controls all aspects of the manufacturing process. All operations on bolts, head studs, and other products are performed in-house and closely monitored. Has been able to establish a reputation for “zero defects” quality for its bolts, head studs, and other products.