Grady Lawson
Member
Hi, just found this site and have found a lot of useful information. I just pusrchased an 07 sport trac 4x4 4.0L and I'm intrested in doing some performance upgrades. The first upgrade that I plan on doing is air intake and while I was looking at the stock air intake filter box I noticed that the inlet side of the box has a nice size inlet tube, bigger than ones I have noticed in the past. I'm wondering if a k&n filter replacement for the stock intake would do just as well seeing how it is cold air intake as stock or replacement intake system with the filter open under the hood drawing in warm underhood air would be better.