SBF Main Stud Kit - 351W Dart Iron Eagle Block

The ARP Main Stud Kit for 351W Dart Iron Eagle Block small block Ford engines delivers the fastening reliability required for high-performance engine builds and heavy-duty service. This chromoly main stud kit is engineered to provide superior clamping force and load distribution across the main bearing caps, critical for maintaining crankshaft alignment under sustained boost, nitrous, or elevated RPM conditions where stock bolts cannot be trusted.

Constructed from chromoly steel with black oxide finish, these studs resist corrosion and galling while offering the tensile strength necessary for forced-induction and naturally aspirated performance builds. The four-bolt main configuration with hex nuts ensures proper torque distribution and repeatable preload, critical for ring seal integrity and preventing crankshaft walk. ARP studs are manufactured to precise OEM tolerances and hardened to specifications that exceed factory fasteners, making them the standard choice for engine rebuilders, machine shops, and serious enthusiasts preparing blocks for competition duty or extended service intervals.

This kit is purpose-built for 351W Dart Iron Eagle blocks, commonly used in street rods, race cars, marine applications, and vintage muscle car restorations where displacement and power output demand unconditional fastener security. Whether assembling a fresh shortblock for drag racing, road course duty, or reliable street performance, main studs represent foundational engine security that no builder should compromise on.

ARP has held the authoritative position in critical fastening for decades, with OEM partnerships and competition validation across motorsports disciplines. These studs ship complete and ready for torque-to-yield installation per ARP specifications, ensuring maximum clamping load and consistent performance across the service life of your engine.