Mystery Lexus IS caught testing

The guys from BridgeToGantry caught a very mysterious Lexus IS testing at Nurburgring. It looks like a performance version of the IS-F sedan, a new model that will compete with BMW M3.

The high performance version of the IS-F will be powered by a 5.0 liter V8 engine that produces 429 horsepower and 376 lb-ft of torque. Lexus will use carbon fiber to reduce the weight, so the performances of the car will be increased.

But, could this be the one?