ARP 247-4202 Stud Kit for Dodge Ram 2500 (98–02) Cummins 5.9L Diesel | Premium Head Studs

ARP 247-4202 Stud Kit for Dodge Ram 2500 (98–02 Cummins 5.9L)

In high-compression diesel engines, where every seal matters, the ARP 247-4202 stud kit is designed to keep the head and block clamp loaded evenly. This kit is built for the Dodge Ram 2500 model years 1998 through 2002, pairing rugged manufacturing with a focus on precise fitment.

ARP uses premium 8740 alloy, a grade noted for its toughness and consistent performance under load. The material is treated to a staggering 200,000 psi, delivering stiffness that helps maintain concentric alignment when the engine undergoes rapid pressure changes. After heat-treat, each stud is centerless ground to minimize runout and ensure the studs sit true to their axis. This tight tolerance makes it easier for gaskets and cylinder heads to settle into position, creating a dependable mating surface.

• Premium 8740 alloy with high strength and consistency
• Heat-treated to 200,000 psi for stiffness and reliable clamping
• Centerless ground for near-perfect concentricity
• Thread rolling after heat-treat provides enhanced fatigue strength

One of ARP's standout processes is threading after heat-treat. This post-treatment thread rolling yields substantially higher fatigue strength than traditional pre-heat-treat threading, which translates to a more resilient fastener in demanding driving conditions. For specific engine layouts, ARP also offers undercut studs on select lengths, which helps balance the stretch across multiple fasteners and yields a more uniform clamp load during service.

• Undercut studs on select lengths promote uniform stretch
• Uniform clamp load reduces gasket distortion under load
• Compatibility with ARP recommended lubricants for installation
• Designed to support high-performance applications like turbocharging

What this means in practice is a head-sealing system that can cope with the realities of daily driving, spirited acceleration, or performance upgrades. The kit is designed to work with ARP's recommended lubrication protocol, which starts by lubricating both sides of the washers with ARP Ultra-Torque Fastener Assembly Lubricant before the studs are placed on the cylinder head spot faces. This reduces friction during installation and helps the components seat cleanly.

Whether you are rebuilding a stock engine, restoring a classic performance vehicle, or pushing a Cummins-equipped truck toward higher output, this ARP kit provides a robust foundation. It emphasizes quality control, material integrity, and repeatable assembly—attributes that matter when every torque value, gasket seating, and load path matters. Note that results depend on the broader condition of the engine and supporting systems, and ARP recommends following their supplied torque specs and lubrication guidance for best results.