I just installed Corsa cat back and am awaiting arrival of CAI cold air intake. I have been researching hand held tuners and narrowed it down to Diablo, Hypertech, and Superchips. I have had experience with Hypertech. I purchased Hypertech for my 2001 SS and was very pleased with both the performance gains and the ease of installing and putting back to stock for GM service. Sounds like Diablo Predator may be a little more involved than a simple plug in and answer questions. ???