The CVH model cars is a little better as it actually has an oem ~55mm duct through the inner wheel-arch from which the intake is fed.

That said there seems to be a lot of nasty abrupt bends in the Zetec inlet system.... surely a smooth radius using something like a CDA inlet system would be better even if the routing was the same.

http://www.bmcairfilters.com/infoCDA.asp

Just mount the barrel filter just in front of the heater... Duct the air round in a single smooth radius to the filter housing then onwards to the inlet manifold throttle body assembly.

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