Quote: it's a 4" Mr P. i have a 3" K&N but it's MIA in the garage somewhere. i wanted to give that a clean too & compare but i only have (had?) the round element part.
Yeah I ran a 3" K&N... I was curious why you got different number.. I also forgot what flow I did this at but I believe it was a fair bit higher... wish I still had my paper work