ARP 235-4016 - Cylinder Head 6pt Stud Kit, professional Series, BBC Heads w/ Mark IV, Iron Blocks (4 long exhaust bolts per head)

Big Block Chevy, World Merlin cast iron and early Merlin aluminum heads w/ 4 long 2 short exhaust studs per head,  (All Black Oxide)

4 long exhaust bolts per head. Use on Mark IV blocks