Why You Want Polyurethane Offset FCABs On Your BMW E30, E36, & Z3 (And How To Install Them) ↗
Explains offset front-control-arm bushings and installs polyurethane FCABs into the brackets, which needs drilling and tapping plus a press or vise.
Tools mentioned: Drill and bits, tap set, vise or shop press, silicone grease
Upgrade-oriented; the bracket PNs are on its parts list.