Hello again everyone, I have another newbie question that pertains to anyone that uses a Unifilter PN: NU2393ST. My 700 is an 04, it came with a K&N air filter that was either washed incorrectly or installed incorrectly as it was crushed beyond repair. I don't want to start a flaming issue here this is just my opinion, based on my personal experience. I have used K&N in the past and they let too much dirt thru. That said, I've also used Uni as an outerwears on my VW Buggy. So I ordered a Unifilter thinking it was a stock replacement. I got it today and I don't understand how this is supposed to work. It basicly looks like a thick outerwears!!!!!???? It's just a foam cylinder with no top or bottom. I understand the bottom needs to be open, but what seals the top? It also doesn't fit the cage that came with the bike. Is that a K&N only cage? I am befuddled. Sorry for the long post its hard to explain.