I bought these to replace a set of brackets that broke about a year after installing the coilovers on our 2007 Volvo S40. I replaced the original brackets with new aftermarket brackets when I made the coils. I don't know about other brands of coilovers, but the KW V3 comes with top mounts, so I was only able to use the mount from this kit, not the bearing. So far, so good. The other day it seemed to me that I had heard something about some bumps, but a visual inspection showed nothing abnormal.