If anyone can correct me please do, slight confusion!

1. I was wondering why EVO SC kits plumb the BOV from the high side after the intecooler back to the high side before the intercooler?
2. They also run a bypass line going from after the MAF back to the intake side of the SC.

My understanding is that the BOV should be routed back to the intake side (low pressure) of the SC and not sure why they run the other line (Vaccum maybe)?. Please correct me on the plumbing.

 

POst a picture. Mine simply has a bypass valve between the intake tube and the tube between the aftercooler and throttlebody. The only vacuum line associated with the system is a small line to control the bypass valve which is connected to the right side of the throttle body. The bypass valve needs to be on the engine side of the aftercooler to minimize any feedback of air to the MAF.

Now, I haven't seen their latest setup, but having more bypass routes would only help.

 

Crankcase venting.