11/14/97 build date I believe is the cut off.
I apologize Sam if you mistook my first message as sarcasm. My intentions were good. If you look under your car you will see a y -pipe that makes a radical 180 bend. Although Fords engineering was decent the building of this piece was not. The collector at the base of the y is crushed together causing a restrictive flow of exhaust. You have a k&n intake but your exhasut is slower than the air coming in. See what I mean. More flow out= more flow in = more power.
