As the global leader in Mercedes AMG tuning and calibration, Weistec Engineering once again sets the standard for bi-turbo M157 performance calibration. Fully developed in-house, our ECU tune has surpassed the 600 wheel horsepower mark on a completely stock vehicle with no other modifications. This is the most powerful ECU upgrade ever released! What’s even more incredible is that it is 100% street legal!

CARB EO# D-691-1

With a keen understanding for optimal running conditions for the M157, we have revised many features of the factory ECU programming which creates an astounding 608 horsepower and 660 torque at the wheels on California pump 91 octane all while being street legal.

Key Features:

• +139 Wheel Horsepower

• +186 Wheel Torque

• Eliminate Top Speed Limiter

• Increased Throttle Response

• Optimized Boost, Fuel and Spark