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ARP was founded in 1968 by Gary Holzapfel as a way to help his drag racing friends not lose rounds due to fastener failures. ARP is located in Ventura California and all processes from raw wire to finished fasteners are handled in-house, right here in the USA. Whether a stock item or custom fabrication, ARP has high performance fasteners covered.
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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.