No Stewart, the Zetec has a left side exhaust and the Duratec a right side exhaust.
My "Blacktop" Zetec is as Stewart describes and the exhaust runs along the driver's side.
Very odd, I had a Blacktop in my Caterham, before changing it for a 2.3 Duratec, with the exhaust on the offside, and that had the exhaust down the nearside, the Bl**dy hole is still there in the aluminium side panel.