I got a question foryou twin turbo gurus. I currently have an s480 and will either be purchasing MPI's, Industrial injection, or building my own setup. My question is what is the difference in the MPI kit and the II kit minus the turbo since i already have it. I am not looking to start an arguement on which setup is better just basically what you are getting as opposed to what you may not be getting. There is a significant price difference and need to know what I am spending my money..Thanks