ONLY 2004 F250-F550 & EXCURSION 6.0L POWERSTROKE OEM#’S 4C34-6K775BCA, 4C34-6K775AA, A11567910 CORE SPECS: 25.55″ X 21.22″ X 2.21″ INLET: 3″ OUTLET: 3″ HIGH PERFORMANCE