http://www.outlawengineering.com/index.htmlI have seen this website that sells them, but they don't have any for the Duratec yet. Some of the guys on the Ford Probe site said that they have them and that the performance gain isn't a dramatic change but they do notice a change in temperature & a slight performance improvement. I have been thinking about getting these for my Probe to see how much of a difference there is I just haven't got around to it yet.
