ARP Pro Series Head Stud Kit 625+ Alloy For 03–07 Ford 6.0L Powerstroke F-250/F-350

ARP Diesel Custom Age 625+ Head Stud Kit 250-4205 is the ultimate upgrade for high-horsepower or competition-built 2003–2010 Ford 6.0L Powerstroke engines. Known as the leader in performance fasteners, ARP offers industry-proven head stud kits designed to withstand extreme combustion pressures. Replacing factory Torque-To-Yield (TTY) bolts with ARP studs greatly increases clamping force, helping prevent cylinder head lift, blown gaskets, or catastrophic failure—especially in modified engines where factory hardware simply can’t keep up. With a tensile strength of 260,000–280,000 psi and a yield strength of 235,000–255,000 psi, ARP’s proprietary Custom Age 625+ alloy delivers superior fatigue resistance and durability beyond Chrome Moly 8740 and ARP 2000 materials.

Each stud is vertically heat-treated for full penetration and strength, then precision centerless ground to ensure perfect concentricity. Threads are rolled after heat treatment, increasing fatigue strength by up to 20 times compared to typical studs. Studs are then shot-peened for added surface integrity and finished with a corrosion-resistant black oxide coating. Trusted by professional engine builders worldwide, ARP head studs are a direct-fit solution for the 6.0L Powerstroke found in 2003–2007 Ford Super Duty trucks, 2003–2010 E-Series vans, and 2003–2005 Ford Excursions. There’s simply no better fastener setup for demanding diesel builds.