ARP 185-5401 Main Cap Stud Kit for Main Applications - 2-Bolt

The ARP 185-5401 Main Cap Stud Kit is engineered for 2-bolt main applications, providing superior clamping force and reliability compared to OEM fasteners. This complete kit eliminates common issues like main cap walk and fretting while protecting your engine block's threads from damage during installation and removal.

Key Features:

• Manufactured from premium 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 process, creating threads 1000% stronger than conventional fasteners
• Includes hardened parallel-ground washers and high-quality nuts for complete installation
• Rolled threads provide vastly superior fatigue life compared to cut threads
• Generous under-head radius design reduces stress concentrations

ARP main studs are the preferred choice of professional engine builders for both high-performance street and competition applications. The superior thread engagement and clamping characteristics of studs versus bolts help maintain critical main bearing clearances under extreme loads and RPM. Each fastener is manufactured to exacting tolerances to ensure consistent torque values and reliable engine assembly.