Bear1209
Member
What is everyone's experience with installing a cold air intake on the 4th gen expeditions? Was there any worthwhile increase in gas mileage? My first truck was a 2003 V6 F150, which I installed a K&N CAI that provided about a 2-3 mpg increase.
Also, from what I've read online it should not void the powertrain warranty, but does anyone have knowledge otherwise?
Also, from what I've read online it should not void the powertrain warranty, but does anyone have knowledge otherwise?