Originally Posted by 97ranger xlt
i didn't notice any difference at all in performance/mileage when i took out the k&n.
i wanted to avoid fouling the MAF so i replaced with a standard paper filter.
Smart move! Those that think they are getting an improvement with the K&N is due to the "placebo effect". Check this chart out. It is a study I did some time ago, showing the OEM air filter area of the 2.3L, normalized for displacement. The 2.3L has more air filter area than a V-12 Mercedes, Mustang, or Corvette!!
One other thing you should realize. With the CAFE standards, vehicle manufacturers DO NOT design the intake system to be restrictive that would
limit engine efficiency. This appiles to all vehicle manufacturers!!