Porsche 911 Carrera S (991.2) ECU SoftwareOverview Porsche 911 Carrera S 991. 2" 3. 0 L flat 6 Twin Turbo Expertly calibrated and meticulously refined, HEX Tunings ECU software for the 991. 2 Porsche 911 Carrera S is guaranteed to give you MORE of a good thing. More horsepower, more torque, and a more exhilarating driving experience by delivering usable power through improved throttle response and torque management. With additional ft. lbs. of torque through the mid range, acceleration out of