Rear adjustable camber arms
 

Has anyone tried making rear adjustable camber arms after lowering their car?

Took only a few hours to make these using all German parts. Works amazing and didn't have to spend several hundred dollars. One tip if anyone wants to do this is to try to keep the length of the shaft with both end links fully dialed in the same length as the OE arm. This way you can avoid having too much negative camber and you always can dial back in to have a baseline setting to stock specs. Theoretically, the entire rear suspension can be made to adjustable arms, but I see no need to do so as the rear toe is already adjustable and the camber was the weak link when the multi-link suspension was designed.