ARP 250-4301 Head Stud Kit 11-23 Ford 6.7L Powerstroke ALI-AP0021 MACHINED PORTS: These manifolds have

MACHINED PORTS: These manifolds have both the inlet and the outlet ports machined to match the factory ports

All kits include a complete hardware kit

Core Charges include OD Pressure Plate

If you've done even mild upgrades to your 6

ARP 250-4301 Head Stud Kit 11-23 Ford 6.7L Powerstroke ALI-AP0021 MACHINED PORTS: These manifolds haveIf you've done even mild upgrades to your 6. 7L Powerstroke, we recommend replacing your stock head bolts with head studs as solid preventative maintenance. These trucks are almost too easy to add exponential power to, meaning cylinder pressures can increase if other factors are not addressed, especially if you have a lead foot. The best means to prevent against head gasket(s) failure is by upgrading to a set of ARP's 220,000 PSI Tensile Strength Head