GM LS MAIN STUD KIT

The ARP GM LS Main Stud Kit (Part No. 234-5608) is a precision fastener assembly engineered for GM LS-series engine rebuilds, high-performance applications, and race-prepped powerplants. ARP's chromoly stud kit delivers the load-holding reliability required in demanding engine environments where factory fasteners reach their limits. The 12-point nut design and black oxide finish provide secure clamping force and corrosion resistance across repeated thermal cycles.

This main stud kit is designed to maintain consistent clamp load under extreme conditions—whether you're running forced induction, nitrous oxide systems, or sustained high-RPM operation. The chromoly material offers superior tensile strength compared to standard steel studs, reducing the risk of fastener failure during peak combustion pressures. ARP's proprietary 12-point nut geometry distributes load more evenly across the fastener interface, minimizing galling and ensuring repeatable torque specifications during installation and future engine work.

Engine builders, LS swap enthusiasts, and performance shops rely on this kit to address a known weakness in original GM LS main fasteners. Whether you're rebuilding a tired 5.3L for street duty or constructing a dedicated competition engine, the ARP GM LS Main Stud Kit ensures your crank stays secured. The black oxide finish resists surface corrosion in both wet and dry storage conditions, protecting your investment between builds.

ARP fasteners are recognized across automotive and powersports industries as the standard for high-reliability critical fastening. This kit comes ready to install with no additional machining required, making it the direct bolt-in choice for serious LS engine work.