BRAND NEW IN BOX. Pro series cylinder head studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining and are rated at a whopping 220,000 psi. ARP Pro series kits are also available with 12-point nuts, and all kits come complete with hardened parallel washers for an even load distribution and accurate torque readings. For Toyota 3SGTE custom age 625+. Fastener Material: Custom age 625. Fastener Finish: Black oxide. Cut to Fit: No. Head and Main Studs. Local pickups are welcome for this item. Your address must be confirmed. Buyers who pay with unconfirmed addresses will not be accepted. We always look to satisfy our customers in whatever needs they may have.