I'm still at Cobb stage 1. Haven't decided if I want to get the intercooler upgrade just so I can run stage 2. I don't push my car very hard, and the temperatures here rarely get above 90. Maybe if I win the lottery - or the American Muscle $7000 parts giveaway - I'll take that step, but right now I'm happy with stage 1.
Anyway, Zhent, I hope you let us know how stage 2 works out for you.
Adding power makes you faster on the straights. Subtracting weight makes you faster everywhere. - Colin Chapman