Gotta give props to Nut n Much , Joe , for helping me install some lowering springs today. And when I write help I meant hand him the tool he needed when he asked for it. lol. I wanted to try to do it myself but after seeing what Joe did , I'm glad I didn't try it. The springs I bought were originally for a g37. I called z1 to confirm if they would fit and they said yes. Joe found out otherwise. The screws are shorter that bolt the top part , sorry I'm sure there is a name for it but I don't know it. Not to mention the springs in the rear had some type of metal in lodged in between them. It was a mess. So thanks Joe for all of your help. I will put pics up tomorrow . Got home late.