SBC Main Stud Kit w/ 3.500-4.000 Stroke

The ARP SBC Main Stud Kit with 3.500–4.000 stroke is a chromoly fastener assembly purpose-built for small-block Chevy engine builds requiring robust main bearing retention. This kit delivers the structural integrity necessary for high-revving or high-displacement applications where factory fasteners fall short. The four-bolt main configuration with hex nuts provides proven clamping force distribution across the critical junction between block and main caps, essential for maintaining bore alignment under load.

Chromoly construction elevates tensile strength relative to stock hardware, allowing tighter torque specifications and improved clamping consistency. The black oxide finish provides corrosion resistance during assembly and storage while maintaining a professional appearance in the finished engine bay. The stroke range of 3.500–4.000 inches covers the most common small-block Chevy displacement configurations, from 327 cubic inches through 406, making this kit adaptable across multiple build platforms. Each stud and fastener is precision-manufactured to ARP's tolerances, ensuring repeatable fit and reliable performance across repeated assembly and disassembly cycles.

This kit addresses the needs of engine builders, race shops, and serious enthusiasts restoring or modifying small-block Chevy powerplants. Whether upgrading a street engine, preparing a vehicle for track duty, or rebuilding with performance-oriented specifications, quality main studs are non-negotiable. ARP's main stud kits are recognized industry standard in engine machine shops and are specified by builders who prioritize durability and resale value. The complete kit format eliminates the need to source fasteners individually, streamlining the build process and ensuring matched specifications throughout the main bearing assembly.