http://pages.ebay.com/link/?nav=item.view&id=262405709274&alt=web

IMHO they are too big for a standard Zetec, whether 1.8 or 2.0 litre.
Good results can be had with GSXR600 items on a standard engine.
It is, however, quite a comprehensive setup on offer and should not pose a restriction to any subsequent engine tuning.
I'd ditch the filters though.