hi all, VERY interesting articles!!! i havea 1995 plymouth neone, SOHC. ive used k and n for a while, rectangular shaped type. after a year, i washed i of, and literally NO dirt, dust ect cmae of, other than the ornage/reddish stuff. iw ent back to fram triad paper filters. i was reading abou NAOA godl filters. is their a better paper filter ou thier? i jsut got of the fram oil filters, becuase of their lack of filtration and oil pressure flows, so i figured the same for their air filters too. how about AC delco as well?