Do You have a Tuner?? The 90-100mm CAI Airaid is great for future MOD's.
It will help with flow but as you pick up say long tube headers or CMDP's you can see the CAI making a bigger difference.
These are just plain CFM facts. Some have 100mm CAI Ported and Polished heads and add 39lb injectors and a Boost A Pump with Long Tubes pushing some nice numbers and times.
The design after 2009 going into the 10 models 4.6 got a little make over in the intake area that yielded the 2010 4.6 more HP. The intake or CAI designed by Ford in the Bullitt made more HP from the factory.