Im just waiting on the transport company to get the car back to me. Ended up with 340hp, but that was a mild tune because there where a few things I needed to take care of. 550 injectors is plenty, make sure u have a second fuel pump and I do recommend a fuel return system, but its not a necesity until u get to about 450hp. The PE kit is a very quick spooler. Almost too quick. It jams so much air into the cylinder early in the RPM that it can be kinda hard on the pistons (AAM told me that... not sure though). As soon as I get it back, I will try and put up some better info on it.