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OK so it seems that pre-turbo is the way to go. As far as drilling and tapping a hole in the exhaust mainfold, should I remove the ehaust manifold from the engine to do this?
My concern is the little bits of metal from the drilling and tapping? If I don't then won't all the metal bits be blown through the turbo and possibly damaging it?
Or is there a way to minimize/prevent this while leaving the mainifold on the engine. Getting the exhaust mainifold is a pain in the buttocks.....
Also is there a particular spot on the mainifold I should install the probe?
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