Thanks for the replies. The reason I'm asking is because I bought the larger Mercedes air box which has 3" intake tubes on each side. I have silicone adapters to adapt down to the original 2.75" curved intake tubes that run down to the radiator support. I'm just wondering if it's worth it make the whole thing 3 inches wide and put a scooped front end of 3 inch tubes just in front of the radiator support.
I realize the NeedsWings CAI is the ideal system. But I just can't see throwing out that much money at this point. I just bought my XF and this is still new to me.
But one thing's for sure... the Mercedes Air box is much more attractive than the original one.