The Subaru Impreza WRX STI (GDB-F) was the last GD Impreza model by Subaru. It was produced from 2006 to 2008. The GDB-F received a new front fascia, which is often called "pignose" by car enthusiasts. Unlike older WRX STI models, it was solely available with the 2.5L EJ257 Flat-4. The DCCD (Subaru Driver Controlled Center Differential) was also updated with this model.