2016–2021 Mercedes-Benz G550 - M176 ECU Performance TuningThis M176 Performance ECU Tune is specifically designed for the 4. 0L M176 V8 Bi Turbo Engine in 20162021 Mercedes Benz G550 (W463) models. Unlock the full potential of your G550 with improved horsepower, torque, and overall performance. G550 M176 Stage 1 Performance Gains Stock Output: 416HP 450 ft lbs of Torque Tuned Output: 510HP 600 ft lbs of Torque Gains: +94HP +150 ft lbs of Torque G550 M176 ECU Tune Improvements Increased Throttle Response