ARP 234-5609 Main Cap Fasteners Main Stud Kit - 4-Bolt

ARP 234-5609 is a premium 4-bolt main stud kit engineered to eliminate main cap walk and fretting while protecting engine block threads. This comprehensive kit includes hardened parallel-ground washers and high-quality nuts for complete installation.

Key Features:

• Manufactured from 8740 chrome moly steel for maximum strength and durability
• Heat-treated in-house to 200,000 psi tensile strength
• Precision J-form threads rolled after heat-treat for 1000% stronger threads than conventional fasteners
• Hardened parallel-ground washers included for proper load distribution
• Designed to prevent main cap walk and fretting in high-performance applications
• Complete kit with studs, nuts, and washers ready to install

ARP main studs provide superior clamping force and reliability compared to OEM fasteners, making them the preferred choice for professional engine builders and serious enthusiasts. The post heat-treat thread rolling process creates exceptionally strong threads with significantly longer fatigue life, ensuring your engine's bottom end remains secure under extreme conditions.