For the 2015 model year, the WRX is all-new. The four-cylinder boxer engine is back to its original 2.0-liter displacement (from 2.5 liters in the 2014 model), the turbo is a new twin-scroll design and moves from the top to the bottom of the engine, and a new six-speed manual transmission replaces the previous five-speed (a CVT is optional). Power is up slightly, with 268 hp and 258 lb-ft of torque