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ARP - 98-Present Dodge Ram 5.9/6.7 Head Studs ARP - 03-07 Ford 6.0L Diesel Head Studs ARP - 08-10 Ford 6.4L Diesel Head Studs
ARP 247-4202 425 head studs for the Dodge Cummins 5.9L and 6.7L. Part number 247-4202 fits Dodge diesel years 98.5 to current ARP Ford 03-07 studs are rated at 220,000 psi tensile strength, and provide the clamping force required to keep cylinder heads from lifting due to higher combustion pressures. ARP Ford 08-10 studs are rated at 220,000 psi tensile strength, and provide the clamping force required to keep cylinder heads from lifting due to higher combustion pressures.
ARP - 98-Present Dodge Ram 5.9/6.7 Custom 625 Head Studs
ARP Custom 625 Material is used to deliver the extra clamp force you need to keep the head on tight.  These are recommended for anyone running over 60lbs of boost or nitrous.