The 2003 Subaru Outback has single overhead cam (SOHC).
The 2013 Subaru Outback has double overhead cam (DOHC).
The 2011 Subaru Outback has single overhead cam (SOHC).
The 2007 Subaru Outback has single overhead cam (SOHC).
The 2014 Subaru Outback has double overhead cam (DOHC).
The 2006 Subaru Outback has single overhead cam (SOHC).
The 2008 Subaru Outback has single overhead cam (SOHC).
The 2001 Subaru Outback has single overhead cam (SOHC).
The 2005 Subaru Outback has single overhead cam (SOHC).
The 2010 Subaru Outback has single overhead cam (SOHC).
The 2002 Subaru Outback has single overhead cam (SOHC).
The 2009 Subaru Outback has single overhead cam (SOHC).