This has nothing to do with exhaust gases, though. This is simply putting in cool air into the intake manifold where the EGR valve used to be connected. I don't know exactly where the cold air comes from--from the intercooler itself, somehow.

But, my question is, wouldn't it be easier to instead of putting the cold air into a pipe between the turbo and intake manifold, to put the cold air into the hole where the EGR valve used to be?

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