GM LS Head Stud Kit 12pt.

The ARP GM LS Head Stud Kit 12pt features chromoly construction with black oxide finish, delivering the fastening reliability required for high-performance GM LS-series engine builds. Head studs replace factory bolts to provide superior clamping force consistency and resistance to thread galling—critical advantages when building or rebuilding LS-platform engines destined for sustained boost, nitrous, or high compression ratios.

Chromoly material offers higher tensile strength than standard steel, allowing engineers to achieve greater clamping loads while maintaining safety margins. The 12-point nut design provides more engagement points than traditional 6-point hardware, distributing load more evenly across the fastener interface and reducing the risk of nut rotation under vibration. Black oxide finish resists corrosion and blending, preserving torque values across engine cycles. This kit is engineered to ARP's specifications for direct fitment on GM LS cylinder heads without modification.

Builders tackling LS engine assembly—whether street performance, track duty, or engine refresh—rely on ARP studs to eliminate fastener stretch, ensure repeatable torque values, and maintain head gasket sealing integrity through thermal cycling and peak cylinder pressures. The GM LS platform's widespread use in swaps, restorations, and power builds has made quality fastener selection non-negotiable for builders seeking durability and consistent results.

ARP has established its reputation in the fastener market by focusing on material science and precision manufacturing rather than marketing claims. Chromoly studs remain the standard in competitive and severe-duty engine applications where fastener failure is not an option.