the early silvertop zetec e came in 1.6 and 1.8 in the escort with efi and later mk6's had the later fuel injection system the name of which escapes me and the mondeo also had the 2l silver top zetec e which is (bar a couple of bits like water pump, sump, oil pick up pipe, etc) a direct swap for the 1.6 and 1.8 zetec e units in escorts.