WTS K&N drop in air filter Apr 7, 2009 18:32:42 GMT 8 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by abc on Apr 7, 2009 18:32:42 GMT 8 Have 1 piece of KNN drop in air filter to sell. Previously used in N16. Model : 33-2031-2Condition still good.Asking for $50. Interested party please sms 96155525.