ARP 247-4212 Dodge Cummins 5.9L 24V Custom Age 625+ Head Stud Kit

The ARP 247-4212 Head Stud Kit is engineered for high-performance and competition applications on Dodge Cummins 5.9L 24-valve diesel engines. This premium kit features all same-length studs for simplified installation and utilizes ARP's proprietary Custom Age 625+ material, offering superior strength over standard ARP2000 kits.

Custom Age 625+ Material Advantages:

• Tensile strength of 260,000-280,000 psi with yield strength of 235,000-255,000 psi
• High-strength chromium-cobalt-nickel alloy construction
• Superior fatigue cycle life and toughness
• Complete resistance to atmospheric corrosion and oxidation
• Stronger than Chrome Moly 8740 and ARP2000 materials

Precision Manufacturing Process:

• Studs placed vertically in special racks during heat treatment for complete heat penetration
• Centerless ground to ensure near-perfect concentricity
• Threads rolled after heat treatment for 10x better fatigue strength
• Includes chrome-moly steel 12-point nuts and parallel-ground washers

Designed to replace factory torque-to-yield bolts, these head studs provide the clamping force necessary to prevent cylinder head lifting under extreme combustion pressures. Ideal for engines running high boost levels or heavy modifications where head gasket integrity is critical. The uniform stud length design simplifies installation and ensures consistent clamping force across all mounting points.