Dodge Diesel Head Stud Kit1998-Up Dodge Ram for Cummins 5.9L/6.7L 24VCustom Age 625+260,000 psi Tensile Strength12-Point NutsIncludes Washers Custom Age 625+ is a super alloy with a superior fatigue cycle life, tensile strength and toughness that completely resists corrosion and oxidation. Dodge Diesel Head Stud Kit. 1998-Up Dodge Ram for Cummins 5.9L/6.7L 24V. 260,000 psi Tensile Strength. Custom Age 625+ is a super alloy with a superior fatigue cycle life, tensile strength and toughness that completely resists corrosion and oxidation. Around here, we don’t just sell parts – we rely on them when driving our own cars around racetracks, dirt trails, and interstates across the country. Parts may be our business – but grease, fuel, exhaust, power, and speed are what we live for. Today, more than 350 people are employed by JEGS and the business draws in hundreds of thousands of customers each year. Yet, we maintain the culture stared by Jeg Coughlin from the very beginning: a family-run performance shop that preserves a trusted relationship with each and every customer.