ARP Oil Pump Stud Kits | Multiple Ford Fitments (150-8801)Oil Pump Primer Specialty Kit by ARP Those first moments that an engine runs prior to building oil pressure are when damage can easily occur. ARP oil pump primer kits let you spin the oil pump with a drill motor and bring up the oil pressure prior to starting the engine. This will prevent unnecessary wear or damage to rotating, reciprocating, and valvetrain components. ARP's rugged primer shafts are rated at 170,000 psi to ensure extended service