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I'm still in the hunt here. Not using the ESS kit, I'm going to fab my own system.
I'm finishing up the N54 intake manifold and TB install and now seems to be a good time to install check valve(s) to keep the boost out of the crank case.
I retained the check valve from the N54 TB to the fuel tank vent. It seems like one is also needed in the PCV line between manifold and valve cover.
Any others?
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