All of ARP's 154-4003 studs are heat treated and feature rolled threads. Material:8740 Chromoly. Nut Style:Hex. Fastener Style:Stud. No better cylinder head studs available at any cost. Notes:351 Windsor with factory heads, M-6049-J302, SVO high port and M-6049-L302 GT-40 style, Edelbrock, aluminum and Iron Dart with 1/2-13 cylinder block threads.
