i had a k&n and i hated the noise. so i got the for a.i.s. kit from the dealer for $220. it has the same or more flow than the k&n. it looks like the same filter as a 6.0l. plus there is no air intake noise and the turbo whistle is as loud as the k&n and i know the filtration is at its best. also did the zoodad. i have no regreats about my purchase. hope this helps.