According to Whipple's site, they do have an optional liquid intercooler available with their kits, though they claim it's not necessary (for reliability) except to gain more Hp.
http://www.whipplesuperchargers.com/product.asp?ProdID=1144
I'm guessing they mean "Methanol Injection" by "liquid intercooler". I couldn't find any details on their site about if this is purchased separately and, if so, how much. Anybody know? I would just e-mail them, but I'm not in the market yet. Just doing research.
If it's a big $ add-on, it may be better to consider the radix. Thoughts?