Hey guys, I was wondering if anyone knows of a product, or of any way to make Eibach springs, that are not flat on both ends, compatible with Bilstein coilover sleeves. I thought that maybe the piece on the bottom of my 5100 strut, where the spring rests now would make the bottom surface flat... but it wont. Is there any product that will? Like something the spring can rest on that has a flat surface so I can use the coilover sleeves? Any help or knowledge would be great.