Here is my solution for my Zetec silvertop 4/4.
There is no change between the injector manifold to the MAF sensor, from the sensor I have added an Apollo cold air intake system with air drawn in from an inlet box just forward of the heater.
So the run of ducting is close in length to the original set up ending forward facing just aft of the radiator!
The engine seems more responsive to the throttle, the performance also seems a little better (being on the Island I have not had a chance yet to put her through her paces)
David
2001 4/4 Avus blue
