I have a 2004 F-250SD with the 5.4L. K&N sells the FIPK for 99-2003 and i was wondering how much (if any) diferent the 2003 are to the 2004 concernig the air cleaner? I dont think that it changed at all but im not sure.

 

I'm hearing that people are using the aftermarket parts from the 2003 on the 2004.
I think the FIPK will work just fine. Buy it from a local store, just in case it doesn't work you will be able to return it.