ARP 202-5803 Main Stud and Bolt Kit

The ARP 202-5803 Main Stud and Bolt Kit delivers professional-grade engine block reinforcement designed to eliminate main cap walk and fretting while protecting critical block threads. Engineered for high-performance and competition applications, this comprehensive kit ensures your crankshaft stays precisely located under extreme loads.

Main Stud Features:

• Manufactured from 8740 chrome moly steel with in-house heat treatment to 200,000 psi tensile strength
• Precision J-form threads rolled after heat-treat for 1000% greater strength than conventional fasteners
• Includes hardened parallel-ground washers and high-quality nuts
• Select applications feature specially designed standoff studs with serrated lock nuts for secure windage tray mounting
• Superior clamping force prevents main cap movement and fretting damage

Main Bolt Features:

• Forged from 8740 chrome moly steel for exceptional reliability
• Generous under-head radius reduces stress concentrations
• Threads rolled after heat-treating for approximately 1000% longer fatigue life
• Available in High Performance Series (180,000 psi nominal) or Pro Series (200,000 psi nominal)
• Pro Series features reduced wrenching head for competition clearance requirements
• Hardened parallel-ground washers included

ARP main fasteners exceed the demands of professional engine builders and provide the ultimate insurance for high-horsepower and high-RPM applications where failure is not an option.