My concern with the fronts is that I recall reading that the lower shock mounting points on the regular Fiesta were somehow different such that if you put them on a ST you'd gain camber which is clearly illegal. It would be great if someone could do some careful measurements.
Sorry, I've been trying to catch up at work. Mounted the Koni sports before Nats and did 4 T&T runs and the six in Lincoln. Spoke with Lee Grimes quite a bit. The Yellow Sports compression is less than OEM struts but are more balanced in rebound which we all knew was very unbalanced on OEM. They were designed this way, with him stating car mfgrs make compression stiffer to give us a "sporty" feel but sacrificing balance. The car was quite stable in transitions as opposed to tank slapping with OEM. It also was more predictable and felt balanced. The car still needs a stiffer sway bar which is my next move.
Shock mounts are unchanged. The rears were very stiff and I almost got a hernia compressing them to twist up more rebound. They were set at 1/4 turn off full stiff.
Strut mounts are identical and have close tolerances. After mounting I kept the lower bolts semi-loose (with a jack under the lower arm) and put a big pry bar on the top nut whilst tightening the top three mount nuts. This did give me a bit of visible inboard movement and when I had it aligned (with me in the seat ) I had the factory camber setting of -1.3 L and -1.4 R.
The only problem is there is very little room for the adjustment piece and a hand on the struts. Also it was very difficult turning and I had to take the right strut off the next day to get a proper grip on the adjustment knob and I'm not sure I have a whole 2 turns of movement, but Lee said that is possible based on valving.
Now after daily driving the rears at stiff and fronts at one turn from soft the car feels good on the street and freeway. There is definitely a better feel. We have three more events and a rallyX coming up so I'll get more input from the Konis as I go along.
I would definitely recommend them and thanks to Koni for the fast action...