I tried to install the Kokeln intercooler also but got stuck when the exit pipe from the turbo wouldn't fit into the intercooler. I took it into Powerhaus in Phoenix to have them get it in. The line you are talking about appears to be just hanging not connected to anything. There is also another line not connected to anything but it used to go into the old stock intake which I replaced with the Powerflow. This setup probably isn't 'correct' for emissions but I don't think it hurts performance. My car seems to run fine.
Chuck
83 911 turbo cab
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