One line goes to the oil fill pedistal nipple and the other goes to the intake ahead of the turbo. This will take pressure or blow by from the crank case and deposit oil particals in the catch can and is aided by the vacumn effect of the intake pulling vacumn. Then you watch the clear tube and when the oil level starts getting higher drain it. I belive you use the pcv nipple on the oil fill and eliminate the pcv valve.
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