So I installed the TRD CAI yesterday and I have a question about the installation. I am not sure what it is for, but there was a brass nipple and a longer replacement hose that connects to the long, black TRD intake tube. I noticed that where the brass nipple screws into the intake tube there was no clean opening through the tube. Logically, it seems that it should be a clean opening in the black plastic tube, but it is a vacuum line correct? The engine runs fine without drilling this hole out, but I just want to make sure it is supposed to be this way or not. I can post pictures later when I get home if anyone doesn't know what I am talking about.