Ok well, I'm leaning towards hiboost atm for a turbo kit...assuming I get a p5 ecu, my question is whether or not it will throw a CEL for another reason, since I do need to bring it in for inspection and a CEL is a no no. Also, I am able to run the car without a hassle using the mp3 ecu as long as I'm around 4psi right? Is it possible to just kinda turn off the turbo (0 psi) and not worry about it at all?