McLaren 650S/ 675LT ECU Tuning SoftwareOverview McLaren 650S 3. 8 L V8 Twin Turbo2014 2017 McLaren 675LT 3. 8 L V8 Twin Turbo2015 2017 Expertly calibrated and meticulously refined, HEX Tunings ECU software for the McLaren 650S 675LT 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