ARP 154-5001 Main Cap Bolt Kit 8740 Chrome Moly Steel

The ARP 154-5001 main cap bolt kit is engineered for high-performance and competition engines requiring superior clamping force and reliability. This 2-bolt main configuration kit features precision-manufactured fasteners that eliminate main cap walk and fretting while protecting engine block threads.

Key Features:

• Forged from 8740 chrome moly steel for exceptional strength and durability
• Heat-treated to 180,000 psi tensile strength (High Performance Series rating)
• Precision J-form threads rolled after heat-treatment for 1000% greater fatigue life compared to pre-heat-treat threaded fasteners
• Generous under-head radius design reduces stress concentration
• Hardened, parallel-ground washers included for proper load distribution
• Professional-grade quality meeting the demands of engine builders

ARP's post-heat-treat thread rolling process work-hardens the material and creates a smoother, more precise thread form that significantly extends fastener life. Each bolt is manufactured to exacting tolerances, ensuring consistent clamping force and reliable performance in demanding applications. This kit provides a substantial upgrade over OEM fasteners for both street performance and racing applications.