Originally Posted by Malekreza11
This is not something that is recommended on the E9x platform unless weld in reinforcements are done at the rear shock towers.
The heavy springs will eventually tear the shock tower.
Many have said the same thing for the E46 M3 and running a full and true rear coilover. But it has been proven otherwise for quite some time, showing that theory is rather different than reality. I know of quite a bit of guys in the E46 M3 platform running true rear coilovers and simply using a small reinforcement plate on the rear shock mounts.
I wonder if the same would ever apply to the E9X M3...