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The ARP Perma‑Loc adjustable rocker arm nut kit supplies 3/8" 12‑point nuts intended for rocker arm adjustment and retention. Presented as an adjustable nut kit, it uses ARP's Perma‑Loc design features to provide a consistent fastening point for valve train setups that call for 3/8" 12‑point hardware in the rocker arm area.
ARP Perma-Loc Adjustable 3/8 12pt Rocker Arm Nut Kit
