I know I am a newbie and I also know that this has been talked to death. I should know I have spent hours on here and everywhere else looking up answers and haven't found anything that really helps. Everything seems to simply bring up more questions. Heck I even tried the Oilbill page or Billoil page which ever it is where the guy tested the filters. For some reason I can't get the images. At any rate, I want to increase the air flow going into my engine a 2000 XJ 4.0, and I am not limited to drop in filters, I am not adverse to fipk's or such but is there a solution. Something that increases air flow but also allows good filtration. Thanks for the help.