I use K&N, I don't pay $12. Hi-flo uses excellent paper, atleast the rep. was convincing. Are they better than Zuk? Don't know, bet as good as zuk's. I like the easy removal, you know, the hex head. And I don't mind paying alittle more for it over hi-flo. If zuk had the hex head at the same price I'ld use them I guess. just my .02