TORONTO, - Ultimately it's all about performance, and the 2012 WRX STI continues as the ultimate-performance Subaru with its high-boost 305-horsepower turbocharged/intercooled SUBARU BOXER engine teamed with a 6-speed manual transmission and the exclusive Multi-Mode Driver Controlled Centre Differential (DCCD) version of Subaru's symmetrical full-time All-Wheel Drive system.