I've mated a Forge CAI with an ITG Filter! So far,performance seems better than the original Forge set up,and i'm not suffering the annoying whistle i used to get when the original filter got wet! It seems to be flowing air more freely,with a slightly deeper growl,and a little less of the more common higher piched whoosh. The fog grill location of the old Forge filter is now home to a 76mm alu air duct intake,with a cold feed direct to the base of the filter. Forgive the DIY foam heat dam around the filter,it's another 'work in progress'!