This handy kit from Earl's includes all the parts needed to install a mechanical oil pressure gauge on most engines w/ 1/8" NPT, 1/4" NPT, or 1/8" BSPT (British Standard Pipe Thread) port on the engine block. This kit includes the extended oil pressure adapter (968803ERL), BSPT adapter (968698ERL), reducer (SS991201ERL), pre-made -3 AN Speed-Seal® hose assembly, and two adapters for the gauge end of the hose. Choose the kit that fits your vehicle application w/ 36", 48", or 72" long hose. This kit is ideal for engine swaps & race cars that use a mechanical oil pressure gauge.