I'm looking into getting a CAI for my 2.0 SKY. I've been looking at K&N as it's only sale for $250 here in Ontario. Is there really a difference between the varying brands that make them? I know people go for Corksport a lot but I assume they'll be the same as KN in terms of make a quality. Though I know nothing about them really in terms of that just assumptions. Any information is great thanks.