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The ARP header bolt kit for Olds 330–355 includes 3/8‑inch header fasteners specified for those Oldsmobile applications. Intended to replace or upgrade exhaust manifold/header hardware, the kit supplies the correct 3/8‑inch bolts for mounting headers on 330–355 engines, supporting proper sealing and attachment during exhaust installation or engine maintenance.
ARP Olds 330-355 3/8in header bolt kit
