I've got a friend that put a Banks kit on his 06 6.0, he gave me the 6.0 Intercooler I had to buy a 6.0 Tranny cooler. I bought the Hoses and had it installed. I can't really tell that difference.
Only when towing will you see a drop. Keep in mind you will have to lower the PS cooler and tranny cooler. I built a bracket and dropped mine about 2".