MagnaFlow Exhaust Products Universal HM Grade Federal (Exc. CA) Conv Univ 2.25" 1997 Ford F-150 5.4 1998 Ford F-150 5.4 1999 Ford F-250 5.4 1999 Ford F-250 Super Duty 5.4 2004 Ford Mustang 4.6 2005 Ford Mustang 4.0 2006 Ford Mustang 4.0 2007 Ford Mustang 4.0 2008 Ford Mustang 4.0 2009 Ford Mustang 4.0 2010 Ford Mustang 4.0