F06, F12, F13 xDrive (2011 - 2018). Powerflex Front Anti-Roll Bar Bush. Powerflex Performance Bushes. Bush Size:28.2. Diagram Position: 3. Fits vehicles without Dynamic Drive or Adaptive Drive. Buying car parts can be tricky as there are often model variations and it is important to check all information such as model, model variations, manufacture dates, sizes and OEM part numbers where provided.