ARP head stud kit for the Ford Pinto 2300cc inline-four with undercut studs and 12-point nuts. The undercut shank improves fatigue strength and clamping load to seal the head gasket on built Pinto engines.
| Type | Head stud kit (undercut) |
| Engine | Ford Pinto 2300cc inline-4 |
| Drive | 12-point |
| Fastener | Studs with nuts |
| Part Number | 151-4702 |
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