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That's not true. There are two lines in PCV systems one going to the intake behind the throttle body and one in front of the throttle body. In this case one behind and the other before the turbo. When you floor it and the intake manifold is pressurized the engine will have higher crankcase gasses from the blow by passed the rings then gets sucked back in from the intake pipe before the turbo. This is where the catch can is placed.
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2008 135i - MHD/JB4, MS DP's, AMS IC, UI CAI, CDV delete, M3 control arms/Links, RE Toe Link, ECS Trailing Arm, M3 rear SF & Trans bushings, SS brake lines, Michelin PSS.
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