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The ARP hex header stud kit for Olds 350–455 includes 3/8‑inch hex studs specified for those Oldsmobile engines. Intended to replace or upgrade header stud hardware during exhaust installation or service, the kit provides the correct hex studs for proper attachment of headers or manifolds on 350–455 applications, supporting secure mounting and improved serviceability.
ARP Olds 350-455 3/8in hex header stud kit
