Originally Posted By: Kawiguy454
I have a 2002 F150 with the small v8 that has crossed the country 4 times pulling trailers and has 180K+ miles on it. It runs like a top and uses .5 qt between M1 extended oil changes. I have had one of those aluminum tube CAI with a K&N filter on the end. Its in a box that is sealed up against the breather hole in the drivers side front so it pulls cool air from outside the engine compartment. I also got a superchips programmer at the time allplied "max tune" and the engine immediately woke up and the tranny shifts tightened up.
The engine definitely breathes better and makes more power but not because of the filter alone. Choose any filter you like if you maintain properly it is not that huge of a difference.
I have a 2002 Expedition 5.4L that has pulled numerous trailers and also has north of 180,000 miles on it. Goes through no oil between changes using AFE 0w-30. I have the stock air plumbing and run an AMSOIL Ea filter in the filter housing (more efficient than a K&N) and before that, ran factory filters.
The factory plumbing pulls in cold air from the fender, the big restriction in the stock system isn't the filter, it is the numerous silencers in the plumbing, the smallest being on the end of the filter housing, and then another one closer to the TB. I pulled both of those and replaced the one at the airbox with a straight piece of PVC tubing (a common mod).
Never had a need to wake up the engine or transmission (I have the 4R100, it shifts fantastically well). The engine works great. Most tuners appear to offer very little for the 5.4L 2V engine