The ZXTuner Cougar header will only fit directly to a 98+ Contour. That's because the 98+ Contour has no EGR. If you wanted to use the ZXtuner Cougar header on a Pre-98, you would have to disable EGR. It's not a very difficult 15 minute job.
BTW, I'm a bit wary of the ZXtuner header. It has no flex pipe at all. It is solid from the header to the resonator flange. If I were going to buy one, I would have a stainless flex pipe added right before the flange that connects to the resonator. (In the stock location.) I haven't checked the Cougar forums. I wonder if there have been any reports of cracking?
HTH,
BP