So I have a 2005 WRX and I noticed oily residue coming from the Y shaped hard plastic tube that runs from the turbo to the intercooler. The plastic tube has a crack in it so I ordered a new one. I have not had the part taken off but is it common for oily residue to be in this area? I am just concerned because it is right near the turbo and I have no clue if it should be oily on the inside of that plastic tube... Does any one know?