ARP Main Studs & Main Cap Bolts

Reinforce the engine’s bottom end with ARP main studs, main cap bolts, and supporting block fasteners. This collection includes application-specific 2-bolt and 4-bolt main stud kits, Pro Series main bolt kits, cross-bolted main-cap side bolts, and windage-tray stud configurations. ARP main fasteners are engineered to provide consistent preload and dependable clamping for factory rebuilds, modified street engines, racing applications, and high-output engine combinations. Confirm the engine block, main-cap design, bolt count, windage-tray configuration, and required machining procedures before installation.