Does anyone know what size the threads are on the guage? The website says "1/8'' NPT male inlets." Now is that talking about the thread or the little hole in the center of the end? Im confused and helpless!! Help!

 

They are talking about the thread size. NPT stands for national pipe thread.

 

you also need a Mr Gasket 3/8" fuel line adapter.



Part #720-2975. I installed mine on the rubber line between the filter and fuel rail. Pick a spot, cut the rubber line, install adapter, install gauge.

I used a Moroso part and had to grind down the barbs a little to slip the fuel line over. Mine has been that way for over 4 years, never a leak.