New ARP fuel pump mounting bolts. This is a 4 pc set, 2 to mount the pump to the block and 2 small ones for the adapter plate to the block. These do not work on block off plates alone. These are 180,000 PSI polished stainless with 12-pt heads. Fits all Gen I small block chevrolet engines : 302, 305, 307, 327, 350, 400.