So here we are again with the question of upgrading turbos. As some of you know, I'm trying to complete my stage 4 MTM tune by doing the turbos and downpipes. I want to upgrade turbos without reconstructing the whole induction and exhaust. So far the only thing I found is the 034 waste gate modification which allows the waste gate to open up at 12 psi instead of 6 which in turn is suppose to allow more boost. There is also the Vast performance billet wheel upgrade which puts in a .59 billet wheel in our turbos and takes the waste gate up to 14 psi. I would like some input on these modifications. Are they safe/reliable? Anybody know anyone who's had them?