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The ARP head bolt kit for early Olds 350–455 engines supplies 1/2‑inch head bolts specified for those early applications. Intended to replace original head fasteners during rebuilds or servicing, the kit provides the correct 1/2‑inch bolts for cylinder head retention on early 350–455 Oldsmobile engines, supporting proper clamping and reliable reassembly.
ARP Olds 350-455 (early) 1/2in head bolt kit
