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The ARP header bolt kit for Olds 330–455 provides 3/8‑inch stainless-steel 12‑point bolts sized for exhaust flange installation on those Oldsmobile engines. This application-specific kit supplies corrosion-resistant fasteners to replace heat-damaged or missing header bolts, simplifying exhaust work while maintaining proper flange clamping and alignment under high-heat conditions.
ARP Olds 330-455 3/8in SS 12pt header bolt kit
