SBF Main Bolt Kit - Fits 351W 2-Bolt

The ARP SBF Main Bolt Kit – Fits 351W 2-Bolt is a purpose-built fastener assembly engineered for high-performance small block Ford engine builds requiring main cap security and load-bearing integrity. Designed for serious engine builders, mechanics, and motorsport enthusiasts working with 351W platforms, this kit addresses the critical need for reliable main bolt technology in both street and competition applications. The 2-bolt main configuration is standard on many classic and performance Ford engine platforms, making this kit essential for rebuild, upgrade, or restoration projects where factory fastener reliability is insufficient.

Constructed from high-grade chromoly steel and finished with black oxide coating, the SBF Main Bolt Kit delivers superior tensile strength and corrosion resistance compared to standard OEM fasteners. The black oxide finish provides durability while reducing galling during installation, a critical consideration when torquing fasteners to precise specifications in confined engine block geometry. The hex head design allows for conventional socket application and ensures consistent clamping force distribution across main bearing caps, which directly translates to stable crankshaft alignment and reduced bearing wear under sustained load. ARP's High Performance Series designation indicates these bolts meet stringent aerospace-grade standards for material consistency and manufacturing tolerance.

This kit is ideal for engine builders upgrading from factory fasteners to improve clamping loads and eliminate potential main cap walk during high-RPM operation or high-boost applications. Compatibility with 351W 2-bolt main configurations makes it suitable for resto-mod builds, vintage racing engines, and performance street motors where reliability cannot be compromised. Installation requires proper torque sequencing and ARP assembly lubricant to achieve rated clamp loads; consult engine-specific rebuild manuals or ARP installation guides for correct procedure. The 2.58 lb weight reflects a complete kit sized for efficient transport and storage on the shop bench or in service trucks.