Okay so the proper place to read fuel pressure is at the rail so can the gauge be put on the rail with the hardware that comes in the kit? My kit has two fittings,(banjo bolt, 90%,and washer w/the gauge) can I mount it on the rail using just what I described above? And what is the stock fuel pressure suppose to be on a stock b16a motor? thanks!

i have an aem fuel rail, and the fittings that came with the package did not allow me to fit it on there--- i have to measure and order attachment fitting--- for now i just stuck it on the fuel filter------i do belive stock b16a fuell pressure is 38psi

I can't think how you'd put it on the rail. I put mine on the filter. Seems to work fine.