I have mine in my o2. It really doesn't matter where you put it, just as long your EGT doesn't go above "normal" readings. Is your car stock? If so, just see where it normally is during WOT and as you upgrade, make sure not to go above, or too above, that mark. There is a big debate on DSM tuners about this. The problem with installing it in the ex.manifold, more so autometer (I'd suggest getting a greddy probe), is that the probe can break off and fall into the turbo.
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Turbo is a decent with modification.
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