The 2006 BMW Z4 has double overhead cam (DOHC).
The 2006 Nissan Titan has double overhead cam (DOHC).
The 2006 Nissan Pathfinder has double overhead cam (DOHC).
The 2006 Acura TSX has double overhead cam (DOHC).
The 2006 Honda Civic has single overhead cam (SOHC).
The 2006 Porsche Cayenne has double overhead cam (DOHC).
The 2006 Hyundai Elantra has double overhead cam (DOHC).
The 2006 BMW M5 has double overhead cam (DOHC).
The 2006 Acura TL has single overhead cam (SOHC).
The 2006 BMW X5 has double overhead cam (DOHC).
The 2006 Nissan Frontier has double overhead cam (DOHC).
The 2006 Volkswagen Touareg has double overhead cam (DOHC).