Fasteners› Engine Fastener Kits
ARP
ARP Perma-Loc Adjustable 3/8 12pt Rocker Arm Nut Kit
SKU: A00M 300-8241
Easy — 1–2 hours
Description
ARP has been a leader in fastener technology since 1968, offering a wide range of high-performance and specialty hardware for various racing applications, including Formula 1, IndyCar, NASCAR, and NHRA. This Perma-Loc adjuster is part of their extensive product line aimed at enhancing engine and driveline reliability.
Fitment
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Specifications
| Brand | ARP |
| Part Number | A00M 300-8241 |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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