This listing is for a brand new set of High Performance Series Cylinder Head Studs with 6-point hex nuts from ARP that are made in the USA. Set includes enough studs, nuts and washers for two heads. Nut Style: 6 Point. They fit small block Chevy 262, 265, 283, 302, 305, 307, 327, 350 and 400 V8 engines with stock 23° cast iron and aluminum cylinder heads. They also fit many 23° aftermarket cast iron and aluminum heads from World Products, AFR, Trick Flow, Brodix, Edelbrock and Dart. Powered by SixBit’s eCommerce Solution.