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Calvin, if you want to run that kind of boost, you definitely need a front mount i/c. The standard i/c is very restrictive, especially as boost rises. When you see 1 bar (14.7 psi - pretty much max safe boost for the standard turbo) at the manifold, your turbo is probably pushing on the heroic side of 20psi - which is waaaay more than you should run the standard turbo at. My guess is that you're wearing it out, and you should reduce the boost until you get a less restrictive i/c.
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