ARP Head Stud Kit ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is precisely heat-treated to 200,000 psi. ARP studs are thread rolled after heat-treat (a very common industry practice). All kits come complete with hardened parallel-ground washers and high quality nuts.
Part Type: Cylinder Head Fasteners UPC: 672036003777 Washers Included: Yes Thread Size: 1/2"-13 Fastener Color: Black Fastener Style: Stud Undercut Stud: No Head Style: Hex Fastener Material: 8740 Chromoly Quantity Sold as: A Kit
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