hi. got a set for sale, removed from my car. because changed to something else which hopefully I dont regret. hahaha. its the hard/soft adjustable type. I know it works on sports springs, but not sure on OEM springs. but the front is for the 21mm nut, which is the bigger nut size usually found on the later E34's. if you're running the smaller nut size, then you have to change the mounting cap to the bigger size.price is 1.1k. I might be tempted to sell my sach sport springs if the price is right. call me on maxis 2010 712.