So I am running 3rd Gen motor in my st165 with everything Idk about the fuel pump though and I am running a 2bar map sensor. My questions are: when I install my 3 Bay map sensor am I going to notice a difference immediately? Also is there any way to find out what fuel pump I have with it dropping the tank? Assuming it's stock for st165 had any one installed a walbro online 255lph instead of an intank and if so do you have to disconnect the original pump or, how does that work? Thanks in advance.