Subaru recently launched the limited edition WRX STI S206 Challenge Package model in Japan, a higher performance version of the already impressive STI. It’s existence, however, is directly related to this car, the S206 racer.
On display for the first time (as far as we know) since winning the SP3T class at last year’s Nurburgring 24 Hour race both the street and race cars share some attractive performance goodies. Along with an up-rated version of the factory 2.0-liter turbocharged boxer engine with 316 hp (not to mention a long list of suspension modifications and a retuned ECU on the street car), both vehicles get a carbon fiber roof and a massive carbon rear spoiler.
This info and more can be found at: http://www.autoguide.com