You MAY want to look at the "Gotts" style mod for an intake. Bill does not have to change anything for this mod once he recalibrates your tunes for the "stock box". Everyone who's tried it seems to think it improves the way the engine performs, without any of the adverse effects of a commercial CAI. Here's a link to how I did mine:
http://www.f150online.com/forums/art...04-2008-a.html
- Jack