Polyurethane bushings / front anti-roll bar mount with Ø19 mm / for BMW 3 Series E30 — TA Technix

The original bushing is made of rubber: it filters well, but deforms under load. When cornering or braking, the arm moves by a few millimeters and the alignment changes during the maneuver - this is the slack between the steering wheel and the wheels.

Polyurethane deforms much less: the connection becomes precise and repeatable, and the car responds at the same point every time. In return, you get more road noise and vibrations in the passenger compartment, especially when cold.