2011 Subaru Impreza WRX STI spec C model features enhanced engine and chassis performance as well as a lighter body on the premise of driving in motorsports. The model further strengthens its presence in the high performance car arena by offering sheer excitement and unique driving sensations as a distinctive sport model, in line with the performance level originally delivered by the Impreza WRX STI.
Subaru further enhances the WRX STI line-up by introducing this STI spec C model, in addition to the regular WRX STI model and STI A-Line model, the AT version.
Ball bearings of the turbine axle were newly adopted to reduce friction in the turbocharger. With the optimized ECU programming, the engine increases the maximum torque by 8 Nm, compared to the base WRX STI model, and it offers smoother and quicker response to the accelerator pedal and excellent accelerating performance. An inter-cooler water spray prevents rise in intake-air temperature at continued high-load driving, providing stable engine performance and improved efficiency.