Originally Posted by VT3C
my vote (as always) is for K&N... the Apexi is essentially the same as a dual-tract K&N filter as it's the same cotton-gauze construction.. I THINK K&N is the OEM manufacturer for Apexi filters POSSIBLY.. they have the same quality.. but you're paying extra for the 'Apexi' brandname.
whatever you do I dont reccomend FOAM style filters like HKS/GREDDY/SPOON etc. they are VERY good for performance, however they do let a fair degree of fine dust through their 'holes' and tack-oil is much messier to service than good ol' regular K&N style filter oil.. I've removed foam filters and insopected the inside of intake tubes and throttle bodies to find a LOT of dust and grime compared to basically none from K&N.