Hello, I write in english since my technical german language is not that good. Anyway, I just want to know what kind of tieferlegungsfedern is a good choice. The one from FK, APEX or H&R. FK-federn goes really cheap on ebay, (109-139 euro), but probably you get what you pay for, or....?? I found this topic about FK, but cant understand everything. http://www.opel-problemforum.de/showthread.php?t=97158