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You can't buy the BMW PCV valve without buying the entire valve cover (there isn't a separate part number for the PCV valve). RB Turbo makes an upgraded replacement PCV valve that is a drop in replacement. I blocked off the crankcase ventilation ports in the head when I replaced my valve cover gasket at the same time I walnut blasted the intake, so my PCV valve no longer serves any function. I have all of my crankcase ventilation routed from the boost side PCV port through an external oil catch can and back into the rear turbo inlet.
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