This may or may not be old news but.....I was at the dealer today and have a copy of the 08 Titan. It advertizes the Endurance now has Variable Valve Timing....and it's not the cheap, one sided variety either. It's Nissans CVTCS system (Continiously Variable Valve Timing Control) found in their VQ series engines. Their Nissan guy just happened to be there today and confirmed that yes....the CVTCS system was added in the 2007 model year which came out in 2006. The 2008 Titan has the same 317HP and 385LB FT of torque as the 07 model. He had had no idea though why it only added 12 HP over the 04-06s.