Having some spare cash i bought an eibach pro kit for the bimmer! As i always thought it sat a little high on the front end,the springs claim a drop of 30mm on the front, and 20mm on the rear, so i took a measurement from the center of the wheel to the bottom of the wheel arch, front = 36.6 cm
rear = 34.8cm, and after fitting the eibachs the front was 34.7 and rear 34.6!, so that means the front has dropped 19mm and the rear has dropped---well nothing! the most apparent thing though, was the springs were shorter, the rears were beefier, but the ride is still as it felt before,,which is a good thing for me!
Any way, i was going to do a how to, but if you saw the thread the other day i had some bad luck, and doing a how to suddenly went to the back of the list!