Proflow Fitting Oil Pressure Gauge Port Adaptor, Suit LS Engines For Chevrolet/Holden Commodore

This billet aluminium oil pressure port adaptor allows you to feed a mechanical gauge line using a 1/8” NPT port while retaining the factory oil pressure switch. It screws into the M16 x 1.50 mm oil line port on the back of the block (LS1) or valley cover (LS2/LS3).