BMW sheet metal at the top of the rear shock towers in e30, e36 and e46 BMW cars are a well-known weak point. The metal tends to tear over time, especially if stiffer shocks are used.
These reinforcement rear shock tower plates are made from 1/8″ steel. They can be welded in or just placed in as is. These come unpainted/uncoated so you can paint to match your car.
Designed to fit on top of the factory shock mount (inside the trunk). It will distribute the load over a larger area to prevent failure. It can also be used to repair already damaged towers.
– Z3, Z4