It is an intercooler. The car (3000GT VR4) was towed in on a trailer, the guys were working on it all day. One of the guys actually owns an N/A Z and wanted to do a TT conversion. We pointed him here. I think I have at least one mpg clip of this thing running the quarter. None of the runs went well for them, I think the best was high 14's if not low 15's.