I know its an old post. I am reviving it because I need some input too.
I have a 2004 GTO. Stops there. 6.2 liter twin turbo. 7 to 14 lbs boost.
I have the 92mm FAST intake and a 92mm Doug's TB.
I have an SLP MAF....temps here vary 100 degrees. Speed desity is an option but would have to keep the computer in the car.
Now I had a professional tuner try and tune my GTO. He could never get the SLP MAF to work. Told me to get a Delphi LS2 Maf.
I have HPTuners software. First you think I can get way with downloading a 2005 or 6 GTO Maf table...remember it is boosted.
Need some thoughts.