the 2000 zetec and the 2001 zetecs have diferant intake manifold designs, or from what i could see.
it looks like the runners are a little diferent., i just did a install (tb) on a 2001 and the intake looked diferant then mine, i didnt pay to much attentuion to it, but it was diferent.
this was a focus zetec 2001 and i as you all know run a 2000 zx3.
so yes there is a diferance, ill see if i can get some pics up by the end of this weekend to show the diferance.
rob