I submit the C.A.I unit as the best candidate.
Ted Jannetty did a bunch of testing and there is a spreadsheet around here somewhere. It tied for the lowest IAT's, had the best "no tune" HP numbers and it fits perfectly. The box is insulated on the inside and the tube is ceramic coated inside and out.
Although it may be a bit tough to find as they are selling like hotcakes and hard to find in stock....
