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When we went to install aftermarket gauges in our Nissan, we ran into a couple of issues that had to be overcome to install our sending units. The first issue is the fact that Nissan uses 1/8 BSPT threads for its sending units rather than the more common 1/8 NPT. The second issue is that we wanted to retain our stock gauges as well. This presented us with a dilemma – where mount our sending unit.

What you see here is a clever solution to both issues for installing oil pressure gauge. The NISsport oil pressure sending unit adapter is installed by first removing the stock oil pressure switch. The oil pressure switch is installed in the 1/8 BSPT “female” end of the adapter, and the “male” end is threaded into the stock oil pressure switch location. The adapter includes three additional 1/8 NPT threaded ports for gauges, oil source for a turbo, or whatever else works for your application. It comes with two 1/8 NPT threaded plugs to seal unused ports.

All of the solutions we’ve seen offered have been made of brass or aluminum. Adapters made from these soft metals often break at the threads to the stock oil pressure switch location. The NISsport oil pressure sending unit adapter is CNC machined from 316 stainless steel for corrosion resistance as well as strength at this critical connection.