M178 ECU Tune

The Weistec M178 ECU Tune is a performance reflash designed to unlock the full potential of your M178 V8 Biturbo engine. This upgrade targets the factory-calibrated ECU, applying the latest calibration technology and extensive testing to achieve substantial gains in both horsepower and torque across the entire powerband. This ECU tune provides an impressive +118 wheel horsepower and +134 wheel torque peak gains, significantly enhancing the vehicle's performance. Beyond raw power, the upgrade also offers a sharper throttle response, an eliminated top speed limiter, and optimized fuel, spark, and boost parameters for a more engaging driving experience. The process involves reflashing your original ECU. Compatibility is specific to the M178 engine family. The ECU tune is not legal for sale or use on pollution-controlled motor vehicles in all US states. Additionally, please note that the Cypher handheld tuner is not compatible with 2020 and newer models. The listed vehicle applications include Mercedes-Benz AMG GT S Coupe (C190) models from 2016-2021.