This is ONE replacement connecting rod bolt, that fits all IE connecting rods which use a 3/8" Rod bolt size. This is a high quality bolt made by ARP from ARP Custom Age 625+ Alloy. These are an upgrade from the common 2000 Alloy bolts. These feature tensile strengths in the 260000 psi range, and very good consistency. They feature high quality threads which are rolled after heat treat for highest fatigue resistance. Features 3/8-24" ARP 625+ Rod Bolt 1.5" Under Head Length Fits all IE rods with 3/8" bolts, some carrillo, and many others.260000psi tensile strength THIS IS ONLY FOR UPGRADE PERPOSES WHEN PURCHASING THE INTEGRATED ENGINEERING RODS