ARP 154-5611 Main Stud/Bolt Kit High Performance Engine Fastener Set

The ARP 154-5611 main stud and bolt kit is engineered to eliminate main cap walk, prevent fretting, and protect engine block threads in high-performance and competition applications. This comprehensive fastener solution ensures maximum clamping force and reliability for demanding engine builds.

Main Stud Features:

• Manufactured from 8740 chrome moly steel with 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 standoff studs with serrated lock nuts for windage tray mounting
• Heat-treated in-house to exacting ARP specifications

Main Bolt Features:

• Forged from 8740 chrome moly steel for superior durability
• Threads rolled after heat-treating for extended fatigue life
• Generous under-head radius design for optimal stress distribution
• Available in High Performance Series (180,000 psi) or Pro Series (200,000 psi)
• Pro Series bolts feature reduced wrenching heads for competition use
• Hardened parallel-ground washers included

ARP main fasteners are the choice of professional engine builders who demand the ultimate in reliability and performance. Each component is precision-manufactured to meet the exacting standards required for racing and high-performance street applications.