I'm sitting here with the 2001 Ford powertrain service engineering book. I look under duratec and it says "2.49 Duratec". WTF? I looked at last year's book and it's at 2.5 liters. Well, I got down to some number crunching and the specs say that the 2001 duratec has a bore of 81.66 mm and a stroke of 79.50. Last year's had the bore of 82.55 mm and a stroke of 78.44. This results in 4 cubic inches lost in the 2001! What happened!?!?!?!?!