Ok, The idle quality on the dual Tb unit is more a factor of the butterflies being slightly open, than the IAC itself. The IAC is more for correction factor. Have been no isses with using them on a cross-ram style intake.
Interesting.......Do you know of any video of them actually running on a crossram? I am about to give them a shot, but I need a little more confidence that the idle wont be a issue before spending the cash......