I have a brand new intake for sale, my sister bought it for her truck but bought the wrong one. Its a K & N 7 7series that fits all these vehicles
2004 F150 Heritage v8 4.6L
2000-2003 F150 v8 4.6L,5.4L
1997-2004 Expedition v8 4.6L, 5.4L
1998-1999 Navigator 5.4L sohc

For more info, or if you are interested shoot me a PM.