ARP 234-5801 Main Cap Stud Kit Chrome Moly - 4-Bolt 12-Point

The ARP 234-5801 main cap fastener kit provides superior clamping force and reliability for high-performance and competition engine builds. This 4-bolt main stud kit features precision-engineered components designed to eliminate main cap walk and fretting while protecting the threads in your engine block.

Key Features:

• Manufactured from 8740 chrome moly steel for exceptional strength and durability
• Heat-treated in-house to 200,000 psi tensile strength for maximum clamping force
• Precision J-form threads rolled after heat-treat provide 1000% stronger threads than conventional fasteners
• 12-point head design allows for precise torque application and easier installation in tight spaces
• Includes hardened parallel-ground washers for even load distribution
• Complete kit with high-quality nuts for secure, reliable installation

ARP main studs are the preferred choice of professional engine builders who demand the highest level of reliability and performance. The rolled thread process performed after heat-treating significantly increases fatigue life compared to fasteners threaded before heat treatment. Each component is manufactured to exacting tolerances to ensure consistent clamping force and long-term durability in demanding applications.