The 2006 Ford Expedition has single overhead cam (SOHC).
The 2006 Ford Mustang has single overhead cam (SOHC).
The 2006 Ford Fusion has double overhead cam (DOHC).
The 2006 Ford Explorer has single overhead cam (SOHC).
The 2006 Ford Escape has double overhead cam (DOHC).
The 2006 Ford Focus has double overhead cam (DOHC).
The 2006 Ford Taurus has overhead valves (OHV).
The 2006 Ford F-250-Super-DUTY has single overhead cam (SOHC).
The 2006 Ford F-150 has overhead valves (OHV).
The 2013 Ford Fusion has double overhead cam (DOHC).
The 2013 Ford Expedition has single overhead cam (SOHC).
The 2012 Ford Mustang has double overhead cam (DOHC).