Just wondering if there are any distinct advantages to the 528 software over the 422 (cooler motor temps, more boost, anything like that?) or if it's just a personal preference thing. I just installed a GT 2.0 LPF and Trinity Nemesis 17.5 in my car this weekend, and it has the 422 software on it. have not had a chance to hit the track with it yet, but ran it about 8 minutes in the street. Felt great, stoopid fast, temped right at 150, but ambient air temps were only low to mid 80's. In less than 2 months we'll be close to 100 deg F here, so the cooler I can get it to run (and still make mad power) the better.