ARP head stud kit for the 2JZ-GTE. Requires 1/2” 12 point socket and 3/16” allen wrench for installation. Fastener assembly lube, hardened washers , and nuts included. Choose either the ARP 2000 with a tensile strength of 220,000 PSI or the ARP 625+ with a tensile strength of 260 - 280,000 PSI.