The ARP 250-4202 Diesel Head Stud Kit is made from a proprietary ARP 2000 material. ARP2000 is an alloy steel that can be safely heat treated to a higher level, producing a greater strength material than 8740. While 8740 and ARP2000 share similar characteristics – ARP2000 is capable of achieving a clamp load at 220,000 psi. ARP2000 is used widely in short track and drag racing as an up-grade from 8740 chrome moly in both steel and aluminum rods. Stress corrosion and hydrogen embrittlement are typically not a problem, providing care is taken during installation.
The ARP 250-4202 DIESEL HEAD STUD KIT will fit all 2003-2007 Ford 6.0L Powerstroke engines regardless of the 18mm or 20mm dowel size in the heads.