The new 911 GT3 complies with the stringent emission standards of Euro 5. Porsche vehicles demonstrate that even high-performance sports cars can achieve moderate emission values in their respective category. The 911 GT3 is not only one of the most powerful sportscars, but it is also one of the cleanest.

This is achieved using two catalytic converters and an oxygen-sensor control system. The two banks of cylinders are monitored separately. Two corresponding oxygen sensors control the exhaust gas composition individually for each exhaust section. In addition to this, another sensor for each bank of cylinders monitors the conversion of pollutants in each catalytic converter.