Bav Autos are the worst. I had a 530 with BavAuto springs. Terrible. I had Sachs kit and it was great. Sachs kit are basically Eibach springs special for Sachs. If the choice is BavAuto or Eibach ProKit, get the Eibach, no question. Also I highly recommend Koni Sport adjustable with any springs. No comparison and in the long run, you will be a LOT happier.
Mike Holbrook
Meridian, Idaho
1992 535im, 17", Euro M5 Throwing Stars 8's & 9's, FK-451 235/45s & 255/40s, M5 Sway Bars 25/20, Conforti chip, Lowes Ram Air, glass sunroof