I'm planning an RS6 nose conversion to my S6 and eventually an RS6 biturbo swap. Right now, I'm doing an 01E 6 speed swap on my tiptronic S6. I'll post up another thread in regards to this later.

As for the FMIC, I was under the impression that the 4.2 Biturbo is super sensitive with water cooling and the lack of flow to the radiator would pose a problem. If this is true, however, I'm not sure what good the aux radiators are behind the IC's on the 'hot weather' or RS6+ packages.

My S6 has a fairly large aux radiatior on the passenger side of the car where the IC would be located.

I'm interested in seeing if my RS6 IC's are leaking now and will test them. Maybe the same place that will test my radiator can do this?