ARP 155-5401 Main Stud KitARP 155 5401 Main Stud Kit Main stud kit for Ford 390 428 FE Series engines, designed to improve main cap retention. Studs reduce block thread wear compared with repeated bolt installs More consistent clamp load than bolts Includes nuts and washers Follow ARP installation and torque procedures Fits: Ford: 390 428 FE Series applications
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