my bad - the soft rubber hose close to your thumb I think attaches close to the bottom on the back of the intake - RealOEM.com * BMW E53 X5 4.4i Crankcase-Ventilation/oil separator

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01' 4.4 Sport - Dec 2000 build
01.5' - Audi B5 S4
97' - FZJ 80 Land Cruiser