I have been looking for a set of these for a long time, and they just dont make them for a Grand Prix. They look for the most part pretty simple to make, if you know someone with a CNC machine. My file set and dremel tool just wont cut it...haha
They mount on the top of the strut and allow you to adjust camber and caster by adjusting the top angle of the strut.
These are for a mustang.
webracin