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The ARP 12‑point header bolt kit for Olds 330–355 includes 3/8‑inch, 12‑point fasteners specified for those Oldsmobile applications. Intended for header or manifold installation on 330–355 engines, the kit supplies the correct 12‑point 3/8‑inch bolts to secure exhaust components and help ensure proper attachment and sealing during installation or service.
ARP Olds 330-355 3/8in 12pt header bolt kit
