So I went to Advance Auto today and picked up a new Fuel Pressure regulator for my GT.. everything looked the same from the quick glance under the hood to the new part, so I went home and let the car sit for a few hours to cool down. I proceeded to de-pressurize the fuel rail and remove the regulator... once i get to out and put it side to side with the new one I realized the new regulator was way smaller than the new one and would not fit. so now I'm stuck so I call a Taxi and go back to Advance with the old Regulator in hand. the Parts guy looked a little confused as to why these 2 parts were different. so after a few minutes of trying to figure out what is going on he looks up a fuel pressure regulator for a 2000 GTP .... and that one was very similar to my old regulator.... same size and configuration ..... So my question is: was the that Advance computers just wrong or does my car have something weird going on?