The Porsche 911 Carrera 4 GTS is a high-end sports car that was introduced in 2012. It is based on the 997 generation of the Porsche 911, and is powered by a 3.8 liter flat-six engine that produces 408 horsepower. This engine is mated to a seven-speed PDK dual-clutch transmission, which sends power to all four wheels. Unique features of the Carrera 4 GTS include Porsche's active all-wheel drive system, larger brake discs, and the option of four-wheel steering. The Carrera 4 GTS also comes with exterior trim and interior appointments that set it apart from other 997 models.