Engines and Components› Cylinder Heads and Components
ARP
ARP 1/4-20 X 4.125 Hex Black Oxide Bolts
SKU: A00M 650-4125
Easy — 1–2 hours
Description
Developed by Automotive Racing Products (ARP), these bolts are designed to address fastener failure issues, as identified by founder Gary Holzapfel in the early 1970s. ARP has since grown into a diversified manufacturer with extensive facilities for forging, heat-treating, machining, and quality control.
Fitment
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Specifications
| Brand | ARP |
| Part Number | A00M 650-4125 |
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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