well at least they were free!I had a set of prototype springs installed on my sedan by Eibach about a month ago. I waited until now to post because I wanted to get a feel for them. Do not buy these springs if you want performance. The ONLY thing the springs do is lower your car 1.5". There is absolutely NO performance gain. If it's performance you're looking for, buy coil-overs. For my taste these springs blow.