You can put together something like this. The links for the silicone couplers are about the cheapest you can find. Paint the couplers or get some in black, and it will almost look factory. Total pirce with a K&N filter is under $100, which is far cheaper than any aftermarket kit and flows just as good.

The pic is here- http://www.contour.org/carprofile/fi...gine_bay_5.jpg

The thread is here- http://www.contour.org/ubbthreads/sh...5&o=31&fpart=1

The best plugs for the Zetec are Motorcraft double platinum. It doesnt seem to like much else. Unless your stockers are crap and worn out, you will not see a boost of any kind, except mabye faster starting, and smoother running.

The chip should be reprogrammed after you are done with all the mods you are going to do. Then you tell the reprogrammer what you have done, and he can rework the chip to work with all the aftermarket parts.