Polyurethane bushings for BMW 3 Series E46 / rear axle stabilizer bar mount with 21,5 mm Ø — 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 geometry changes during the maneuver - this is the vagueness 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, more road noise and vibrations reach the cabin, especially when cold.