The N54 FMIC was showing IAT increases of 35-40 degrees, were as the F80 top mount intercooler shows increases of 10-15 degrees. Every new car uses water to air intercoolers because of how efficient they are. With the N54 and S55 sharing the same part number for the intake manifold most of this is plug and play. With very little other modifications needed the N54 might have unlocked an easy way to save weight and make more power!