Does anyone in here have the Jay B turbo upgrade or the Ferrari F40 turbo? If so, how is it doing for your cars? I got a stupid TKT and it sucks! Going to blow any day now. So I gotta get a new one! How about the T-Bird upgrade also? Heard some good stuff, only that it can't hold a lot of hp, F40 is to be better, then Jay B and Ghetto TKT. HELP!!!