When we tested the car. The STI is Subaru's signature rally car, competing with the for the hearts of gearheads around the world. But apparently Subaru was holding back, as it just released a limited run of 900 of a Spec C version of the WRX STI, this new car featuring even better performance than the standard STI.last year, it seemed as if Subaru poured everything it could into this halo
Subaru managed to reduce friction in the STI's turbocharger through the clever use of ball bearings, which in turn let the company reprogram the engine computer. Although horsepower remains the same, at 305, torque has been upped to 311 pound-feet, from 290 in the standard STI. According to Subaru, it has improved handling by replacing the rear Torsen limited slip differential with a mechanical one, and also tweaked suspension springs and shocks. Subaru even shaved off some weight by fitting the Spec C with an aluminum hood and smaller battery.
But, as usual, Japan gets the best toys. The Spec C hits dealers in Japan today, and won't be exported.