It's just a Focus.
As the thread title says, what is the best plugs for an '03 Zetec? A noob question, I know, but I want to get the right stuff that'll last a long time and may get a SLIGHT bump in performance/feel. I've heard some decent things about Autolite plugs, but are clueless as to what kind to get. Right now, it has some Motorcraft Platinum plugs that look a little worn and should be replaced. If anybody wants a pic of them, I can dig one up on my iPod.