The ARP 250-4302 Custom Age 625+ Head Stud Kit is designed to keep your 6.7L Power Stroke sealed under extreme pressure, delivering the clamping force needed to help prevent head lift and gasket failure in high-performance and heavy-load applications. Built for 2011–2023 6.7L Power Stroke engines, these studs are manufactured from ARP’s Custom Age 625+ material for exceptional tensile strength, fatigue resistance, and consistent clamping under high boost and demanding conditions.