Proflow's Fuel Gauge LS Kits includes all the parts needed to install a mechanical oil pressure gauge on the GM LS engine. This kit includes the special 16mm x 1.5 adapter fitting w/ crush washer (fits oil passage at the top rear of the LS engine block), pre-made -3 AN hose assembly, and two adapters for the gauge end of the hose. Choose the kit that fits your vehicle application w/ 36" or 72" long hose. This kit is ideal for engine swaps & race cars that use a mechanical oil pressure gauge w/ the GM LS engine.