Need the best Head Studs on the market? It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all-out competition powerplants. Simply stated, there’s not a better stud setup on the market today. For openers, ARP uses a premium grade 8740 alloy that is rated far superior to “aircraft” quality. Then, each stud is placed vertically in special racks and precisely heat-treated to 200,000 psi. 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. UPS will not deliver to PO Box or APO/FPO addresses. Parts that do not work with the vehicle they were built for will be exchanged. Items must include all original packaging. Address will be e-mailed to you on request of return. Once items have been received with a return number & inspected, a credit will be issued to the customer. S states and Canada and many other international destinations. If you need immediate availability. How long will it take to receive my product? S addresses within the 48 contiguous states. We will not be able to “Gift” the product.