The way I understand it, the GC setup is in fact an Eibach kit that allows for variable height adjustments, giving you the option of fine tuning the height. Changing out different spring rates offers even more possibilities. The standalone Eibach kit will only allow you to drop a certain height, period.

I guess I'm like everyone else in that I'm waiting for feedback on how these are working for the common everyday driver. I have larger tires for a more comfortable ride (taller sidewalls) but would like the dropped look while retaining that comfort and avoiding any rubbing. And yes I do have the Konis installed.