Powerflex Road Series Car: Vauxhall / Opel - Signum (2003 - 2008) description: Rear Upper Arm Inner Bush purchased parts package: 2 installation location: rear notice: This replaces the original 2 piece design. For the single-piece design please use PFF66-503-*. For the Astra MK5 single-piece design, please use PFF80-1303-* Diagram reference: 12 Part no.: PFR80-1212