Post by
nissanfanatic »
https://forums.nicoclub.com/nissanfanatic-u21678.html
Wed Apr 06, 2005 7:29 pm
Large one on the bottom can be removed along with the box its connected to.
The second largest one is the IACV. This has to be connected to your cold pipe.
The smallest one can be plugged.
The hose running from your valve cover to the intake can be routed to your turbo intake after teh mafs or it can be left open. People run it both ways.