ARP  134-3601  1343601 High Performance Series Cylinder Head Hex Bolts For Use With 23 Degree OEM Cylinder Heads And Most Edelbrock/ LT-AFR/ Brodix -8; -10; -11; -11xb/ LT-1/ Dart Pro -1/ Trick Flow Heads/ Most World Products Heads Hex Style Head Type 180000 Pounds Per Square Inch Tensile Strength Includes Washers