Rolls Royce Cullinan ECU Tuning SoftwareSection 1 Rolls Royce Cullinan 6. 75 L V12 (N74) Twin Turbo 2018 Present Stock Power: 563HP 627TQ Expertly calibrated and meticulously refined, ECU software for the Rolls Royce 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