Mabye a diagram will help.
First off, is a Dual Radiator a good idea in this case?
I would rather use just the 2x80mm radiator. (As if fits my case design)
I think I will try to adapt the FX51 cooler down to 3/8" to keep flow splitting as even as possible.
I can use the tubes splitters here:
http://www.aquastealth.com/index.asp...PROD&ProdID=68
They adapt 1/2" to 2x 3/8" or 3/8" to 2x 1/4"