Originally posted by str8edgexx
I don't believe that. Before I put my K&N in, I was getting about 35-36 mpg on the highway, and now I'm consistanly getting 39+...and I haven't done anything to my car besides that. I noticed the effects immediately too. You can't say that its in my head either, because numbers don't lie.
and im sure if u drop in another filter...itll do the same job...