f150 power-need
gears, im in your same situation, for $270 cold air intake add a little difference, and for $200 4:10 gears should add alot bigger difference than cold air intake... no matter if you get k&n , airaid, s&b
Just remember if budget is an issue, exhaust and air intake will help improve fuel ecnomy. Gearing to 4:10 will do the opposite.

