W/P & Thermostat Housing Bolt Kit - 6pt. LS1/LS2

The W/P & Thermostat Housing Bolt Kit - 6pt. LS1/LS2 by ARP is a premium fastener upgrade designed for LS-series engine builds and restorations. This kit is essential for anyone looking to enhance the reliability and performance of their LS1 or LS2 engine, particularly during critical assembly or rebuild processes.

Constructed from aerospace-grade chromoly steel and finished in black oxide, these bolts are engineered to resist corrosion and maintain structural integrity in high-heat environments. The 6-point hex head design ensures an even load distribution across the fastener head, significantly reducing the risk of stripping compared to 12-point alternatives. This kit also includes washers to prevent fastener pull-through into softer aluminum castings, a detail often overlooked by budget options.

Mechanics and engine builders frequently specify ARP fasteners for critical cooling system applications due to their superior quality control, which guarantees consistent hardness and dimensional accuracy. This bolt kit is particularly beneficial for LS1 and LS2 owners performing engine assembly, rebuilds, or restorations where reliability is paramount.