Valve Cover Bolt Kit GM LS1/LS2 12pt

The Valve Cover Bolt Kit GM LS1/LS2 12pt from ARP is a precision fastener set engineered for high-performance LS-series engine builds. Designed for technicians and engine builders who demand reliability under extreme conditions, this kit replaces factory valve cover fasteners with chromoly bolts that deliver superior clamping force and vibration resistance. Whether you're assembling a street performance engine or a competition powerplant, these bolts ensure your valve covers stay secured through sustained RPM and thermal cycling.

Each set includes 8 fasteners machined from chromoly steel and finished in black oxide for corrosion resistance and professional appearance. The 12-point head design provides multiple engagement surfaces for precise torque application and reduces fastener rounding during installation—critical when working in tight engine bay spaces. At 2.755 inches in length with a 6mm male thread, these bolts accommodate the OEM valve cover geometry while the included washers distribute load evenly across composite or aluminum cover surfaces, preventing stress concentration and gasket leakage common with undersized fasteners.

This kit is ideal for LS1 and LS2 platform builders tackling restorations, upgrades, or engine bay refreshes where OEM fasteners have become worn or stripped. The chromoly construction handles repeated disassembly cycles without galling, making these bolts a practical investment for long-term engine maintenance. ARP fasteners are trusted throughout professional racing and law enforcement motor pools for their engineering integrity and consistency—qualities that translate directly to the reliability your build demands.