I've got a 2005 Sport Trac. I want to put the K&N air filter (FIPK 57-2529-1)on my truck, but the K&N site does not list the filter as available for the 2005, only the 2004 on back. I called K&N on this and they stated they had not tested to 2004 filter on the 2005 yet, hence not listed...