The ARP 247-4204 Custom Age 625+ Head Stud Kit is built to keep your Cummins sealed under pressure, delivering the clamping force needed to help prevent head lift and gasket failure in high-load, high-boost, and performance applications. Designed for 1998.5–2024 Dodge/Ram 5.9L and 6.7L 24-valve Cummins engines, this kit is made from ARP’s Custom Age 625+ material for exceptional strength, fatigue resistance, and long-term reliability in trucks that tow, haul, or make serious powe