Subaru Cosworth Impreza STI CS400 WallpaperSubaru Cosworth Impreza STI CS400 WallpaperCosworth brings supercar performance figures to a hothatch in the form of a Subaru Impreza.Starting with the Impreza STI's 2.5-liter boxer unit, Cosworth's engineers installed new high-performance pistons, connecting rods, head gasket and bearings. The tune-up also includes a remapped ECU, modified turbocharger
