This ARP head stud kit is specified for Oldsmobile 350–455 engines and uses 3/8" 12-point studs to secure cylinder heads. Supplied as a head stud kit intended to replace or upgrade head fasteners on compatible Olds small- and big-block V8s, the kit provides the clamping hardware needed for head installation in those engine applications.
ARP Olds 350-455 3/8 12pt Head Stud Kit