There's a long story to these but basically we got two sets of DMS for the BRZ a few years back, one for our shop car and one for a customer car. Ultimately these should be paired with a raised strut tower in the front. The customer kept them for six months before sending them back and there is a surprising amount of corrosion on the threads from his "testing" them. We've kept them around for spares. Include brand new Group N front top mounts and aluminum DMS rear top mounts.