On the stock twins setup, there's a vacuum line that leads from the rats nest to the intake pipe (in front of the primary turbo) 90 degree elbow

I believe the 2 lines are:
Oil Injection vacuum line and intake air bleed socket

When you go single, can I just cap that off? Or are those needed for the car to run right?

I'm following directions from this site, page 10 step 21
http://xs-engineering.com/media/faqdocs/15_print.pdf

 

Oil Injection vacuum line and "positive crankcase breathing".
The first is needed, the secopnd can go to a catch can then to atmosphere.

 

thanks cewrx7r1

 

can't look away from signature... forgot to read question...