okay so i have a 2001 pontiac grand prix gt 3.8.
I have gotina 3800 pcm tune, a set of pace setter header and a 3 inch exahst with a magna flow high flow cat. no resinator.
I also have a cold air intake and a alternator booster and tb spacer, these two things i dont know if they did anyhting or not. and i also have msd coils. out of all these how much hp shouldi have gained? and what are the benifits?