SBF 351C Main Bolt Kit w/4-Bolt Main

The SBF 351C Main Bolt Kit w/4-Bolt Main from ARP is a precision-engineered fastening solution purpose-built for Ford Cleveland and modified engine platforms requiring dependable crank retention. Designed for high-performance and racing applications where engine reliability under extreme load is non-negotiable, this 4-bolt main kit delivers the fastening integrity that separates a solid build from a catastrophic failure. Whether you're assembling a street performer, track vehicle, or competition engine, proper main bolt specification is foundational to longevity and safety.

Manufactured from chromoly steel and finished in black oxide, the SBF 351C Main Bolt Kit meets the exacting standards required for crank stabilization in high-revving and boosted applications. Chromoly construction provides superior tensile strength and fatigue resistance compared to standard fasteners, critical for sustained high-load cycling. The black oxide finish offers corrosion resistance while maintaining the professional appearance expected in engine bay assembly. ARP's reputation in fastener engineering ensures that clamp load consistency and thread geometry are optimized for proper preload distribution across all four main bearing saddles, reducing fretting and elongation under operational stress.

Engine builders, performance mechanics, and enthusiasts restoring or modifying Ford Cleveland platforms will recognize the SBF 351C Main Bolt Kit as essential hardware for any serious rotating assembly. Installation requires proper torque specifications and sequence per ARP's technical guidance to ensure even clamping pressure. This kit is specifically engineered for 4-bolt main configurations on Cleveland and aftermarket blocks, making it critical to verify your block architecture before ordering. Weighing 3.3 lbs and compact in profile, the complete kit ships ready for installation without additional machine work or modification.