Cylinder Head Stud, Hex Head Nuts, Chromoly, Black Oxide, 18 Degree Air Flow Research, Big Block Chevy, Kit

• Premium quality 8740 and ARP2000 head stud kits are available for most domestic and import applications
• offers specially undercut studs for several engines
• Look for ARP stamped on each stud as your assurance of quality

For openers, ARP only uses premium grade 8740 alloy and a proprietary ARP2000 alloy that are rated for superior to "aircraft" quality alloy steels. Secondly, each stud is placed vertically into special racks and precisely heat-treated to 200, 000 psi for the 8740 material and 220, 000 psi for the ARP2000 material. This procedure ensures complete heat penetration and the results are far superior to those lesser quality studs from other manufacturers who just dump pieces in a basket and hope for the best.