I can get the kn for you if your interested. I do not have any in stock but can get ahold of them. I can not do much with the price but $45 plus shipping. Thats the stock drop in filter. If your interested e-mail me at sylvia240sx@hotmail.com. Has everybody been having good luck with the stock drop in? I have been contemplating getting one but, haven't decided as of yet. Is it worth it?