SBF 289-302 Main Stud Kit 2-Bolt

The SBF 289-302 Main Stud Kit 2-Bolt from OPTITORQUE TECHNOLOGIES LLC is a precision fastener assembly engineered for Small Block Ford engine builds requiring robust main journal support. This chromoly construction with black oxide finish delivers the material strength and corrosion resistance demanded in high-performance and restoration applications. The kit includes 12-point nuts that engage fastener heads across more contact points than conventional 6-point designs, reducing fastener rounding and improving torque retention under thermal cycling and vibration.

Chromoly fasteners offer approximately 30% higher tensile strength than standard steel studs, a critical advantage when managing combustion pressures and engine block stress in performance builds. The 2-bolt main configuration addresses Small Block Ford engines with the traditional two-bolt design, making this kit a direct replacement for original or worn main studs. Black oxide coating provides baseline corrosion protection while allowing for traditional appearance in rebuilt engines. The 12-point nut geometry minimizes the risk of fastener damage during installation and removal—essential when access is tight or fastener reuse is planned.

This kit suits engine builders, restoration specialists, and performance enthusiasts working on Small Block Ford platforms where main stud reliability directly impacts engine longevity and stability. Whether rebuilding a stock 289 or 302 cubic inch engine or upgrading an existing build, this kit provides the fastener quality necessary to secure the crankshaft under sustained load. Weighing 2.15 lbs and compact in dimensions, the kit ships ready for installation without requiring additional sourcing of individual studs or nuts.