OEM Reference: 45131FE030 / 45131FE010. GDB WRX STI (Oct 2000 – Jun 2007). GGB WRX STI Wagon (Oct 2000 – Nov 2002). GDA WRX (Aug 2000 – Jun 2007). GGA WRX Wagon (Aug 2000 – Jun 2007). Subaru Impreza. Designed to improve engine cooling and A/C efficiency.