It's the car that my car is a wannabe version of. It's the car that Subaru builds for homologation purposes for FIA rallying. Homologation is something they do to force race cars to be production based cars. If you want to race the car you have to build 5,000 of them or so which are almost identical to the race car. The rules have changed a bit but Subaru still builds the car.
It's an Impreza sedan with an aluminum hood, composite wing, 300 hp turbo engine with variable valve timing and water injection, limited slip front and rear differentials, active center diff, gigantic brakes, extremely stiff suspension, etc. 0-60 in about 4.5 and 1/4 mile in about 13 sec. No radio, no A/C, etc. Mitsubishi makes a similar car called the Lancer Evo.