The stock rubber bushing deflects too much as torque moves through the drivetrain since it isn't strong enough to prevent the diff from moving
these bolt-through 75D poly E30 (M20) mounts are specifically engineered to be the strongest and most reliable on the market
Z3 front subframe engine mount reinforcement kit
You found the GOAT
Eliminate virtually all of this movement with our bolt-through BMW E36
BMW Tie Down Eye Hooks (Rear Shocks) - E30, E36, E46, Z3, Z4 Bump Steer The stock rubber bushing deflectsThese BMW E30, E36, E46, Z3, Z4 Rear Tie Down Eye Hooks install on the rear shocks to provide attachment points for secure tie downs. Our tie down eyes are the thickest available at 4. 0mm thick. Would you trust anything thinner? Easy installation: they simply bolt onto the rear shocks via the lower mounting bolts. These tie down hooks may be used with the stock bolts. Get to and from the track easier with our BMW E30, E36, E46, Z3, Z4 rear tie down