If you own a Chrysler/Dodge 2.2 Turbo I powered vehicle built from approx 1984-1987, this is the factory original equipment coolant return line that runs from the back of your turbo up and over to the driver side of your cylinder head (look at the driver side of the thermostat housing).   It is known as the "coolant return line/hose".
 
Note it is item #7 in the illustration.
 
We have a very limited supply of these, so get them while you still can.  If you are trying to do a perfect (factory correct) restoration on your Turbo I powered Chrysler/Dodge, this is the coolant line you need.  These have been discontinued from Chrysler for as long as I can remember.     This will fit many 2.2 Turbo I powered vehicles including Dodge 600, Daytona, Laser, Charger, Omni, Shadow, Lancer, Lebaron, etc.  Approx from 1984-1987, Turbo I only.