[JET]

I bought one of those XS intercoolers off Ebay just because it was so damn cheap. It was huge and looked great from the outside. Nice welds, and fins in between the tubes were good. I looked inside and frowned. Like Mo said, there are no turbulators in some of them. Sure it will flow like hell, but it won't cool for shit if you are making any power. I put it on the shelf and sold it, then bought a Garrett intercooler core.

It isn't rocket science, it is some simple physics. Like Shane said, a pipe will flow like crazy, but won't cool air for shit.