ARP 247-4211 Cummins ISL 8.9L Head Stud Kit 12-Point ARP2000

The ARP 247-4211 Head Stud Kit is engineered specifically for 1999-2008 Dodge Cummins ISL 8.3L and 8.9L 24-valve engines commonly found in medium-duty and heavy-duty commercial applications. This professional-grade fastener solution provides superior clamping force to prevent cylinder head lifting under high combustion pressures and boost conditions.

ARP2000 Material Construction:

These head studs are manufactured from premium ARP2000 alloy steel, a material capable of achieving tensile strength ratings of 220,000 psi—significantly higher than standard chrome moly 8740 fasteners. Each stud is placed vertically in precision racks and heat-treated to ensure complete heat penetration and molecular integrity. The threads are rolled after heat treatment, providing approximately ten times better fatigue strength compared to studs that are threaded before heat treating.

Key Features:

• 12-point nut design for precise torque application
• Heat-treated chrome moly steel nuts included
• Hardened parallel-ground washers for even load distribution
• Centerless ground studs ensure perfect concentricity
• Broached stud ends facilitate easy installation and removal
• Manufactured in ARP's Santa Paula, California facility
• Includes ARP Ultra-Torque assembly lubricant

This complete kit includes all necessary studs, nuts, washers, and assembly lubricant required for proper installation. ARP head studs are the preferred choice of professional diesel engine builders for high-performance and heavy-duty applications where reliability is critical.