[Racer20]

It is not a shear or horizontal load. It's a bending load. In order to get more camber, the mount has to deflect more from straight vertical, (Or whatever angle is built into the strut towers). If you're trying to deflect a stiffer bushing, then you're going to be putting a huge bending load into the strut shaft.

A polyurethane bushing is a horrible idea for an adjustable camber plate. It's basic engineering, and seeing this failure is part of the reason I distrust so many aftermarket manufacturers.

If you want more camber than the factory gives you, you'll need a spherical bearing, and you'll get more NVH. No way around it.

Further, a camber plate with a urethane or stiff rubber bushing is NOT fine for the street: You may not have a catastrophic failure like this one, but you WILL wear out your struts much faster due to the increased side load on the seals and piston.