ARP Head Studs ( #134-4001 ) Hex Nuts 23 Degree OEM Cast Iron and aluminum Chevrolet, GEN III Vortec/Truck, LT1 Air Flow Research, Brownfield, Brodix -8 -10 -11, Track 1, Dart Sportsman, Dart, and most Edelbrock, Trick flow Picture may not be actual on...