BRAND NEW IN BOX ARP Heavy Duty Head Stud Kit Fits Late 1998-2007 Dodge Ram 5.9L 24-Valve Turbo Diesel Fits 2007-2021 Dodge Ram 6.7L 24-Valve Turbo Diesel ARP has provided an extra measure of security for Dodge Ram Turbo Diesel 24v 5.9L / 6.7L Truck Engines in the form of extra-strong head studs manufactured from the firm's ARP2000 material that has a minimum rating of 220,000 psi tensile strength. Obtaining the optimum cylinder head-to-block sealing is especially critical in engines employing turbochargers. To overcome head gasket failure in truck and RV diesel engines, ARP now offers these heavy-duty head studs for the Dodge Ram Turbo Diesel 24v 5.9L / 6.7L Truck Engines. ARP studs are thread rolled after heat-treat, which gives them about 1000% (that's ten times) better fatigue strength than those studs that are threaded prior to heat-treat. These are the ARP2000 Material for a 220,000psi Tensile Strength. This helps prevent blown head gaskets and ensure optimum sealing in your Dodge Ram Diesel.