seems to be an old topic,but hey,what the heck..
..Ok let me share my experience with Eibach Prokit,i'm using it now together with stock shocks from Pegeot 306 GTI6,and i found it a bit bouncy,especially when speeding at region 160-170 km/h. But no doubt it's good when comes to cornering..
Just bought another set of sport springs,made by OMP and claimed to lower by 30mm.Still no time to put it though.Will update u later when i'm done.
Cheers