Can you post a picture up for us, just so we can be sure?
Now that you said split port, I'm thinking you have one of the SOHC motors...
I, along with just about everyone that has posted in this thread, am having a very hard time believing that it is a Duratec motor in your car.
BTW, sorry for all the doubt, but the 2.0L Duratec (DOHC) motor was only available in the '05+ Focus, whereas the 2.0L SPI (Split-Port Induction, SOHC) and 2.0L Zetec (DOHC) were available in the '00-'04 Focus...also in '03-'04, the 2.3L Duratec (DOHC) was available...the 2.3L was also available in the '05-'07 Focus ST.
Mike