Spied: Subaru WRX STI Spec C Spotted Testing on the Nürburgring

The new 2011 Subaru Impreza WRX STI sedan was officially revealed at the New York Auto Show earlier this month, but our spy photographers have captured the Japanese maker's big-winged saloon testing at the Nurburgring.

At a first glance, it appears that the car is nothing more than the European specification version of the high-performance sedan.

However, a closer look reveals small but important differences clearly suggesting that the STI seen here may very well be a prototype for a limited edition Spec C model.

These include the blacked out alloy wheels, gold colored brake calipers (quite possibly "brembo"), fog lamp covers and the front lip spoiler, all of which were not shown on the New York Show car but are standout features on the JDM Impreza STI Spec C hatchback (see here).

If Subaru follows the same recipe with the five-door Spec C, then the sedan variant should also boast other performance upgrades including a tweaked engine with a recalibrated ECU, revised suspension and steering systems, beefier tires and a different limited slip differential along with a lightweight aluminum hood, laminar window glasses and a downsized battery.