awesome! thanks for the info! The current setup is welded pipe spray painted with runs in the paint but looks like the K&N setup.

??? Vacuum line pulls air through intake via turbo to create positive crankcase ventilation. Just like a turbo diesel. You can vent to air, but that can lead to oil leaks. I could be wrong though i'm not too familiar with the ecotec platform

 

How would you go about getting the bov flange for my injen upper charge pipe? Where can I get a 50mm flange to have welded on there?

 

If you get the cheaper bov from zzp, not the tial, it has an option for a steel or aluminum flange to go with it. If you already have the bov, google it, a lot of people sell just the flange. As long as it is v-band flange it will fit most bovs