I'm going to be replacing my exhaust this spring. I have an 89 Firebird Formula 350, TPI, 5.7L. I was thinking about the Hooker Cat-Back for my car, what do you guys think? Also would the Hooker Cat-Back work on my car, cuz i've heard that the Hooker cat-back doesn't work with dual cats, but i'm not sure if my car is dual cats or not, anybody know? Also, how much would it be to put a dual exhaust system in, and what setup would be the best for that? Thanks a lot!