I've just lowered mine on eibach sportlines, which is meant to be 45-50mm front, 35 mm rear.
front looks around 40, 45, rear hasn't lowered at all, infact nsr hasn't at all which looks odd as my cars pointing down and looks gash. so i've ordered 60mm rear springs to fit. and then fit polo top mounts to the front to level it out and uprate the shocks in due course. all my bushes are polly.