The M157 can achieve 730 horsepower and 1050 Nm of torque with the third stage of power boost offered by StartLine Motors. This requires more radical modifications. For example, the standard turbines are replaced by new, larger ones.
The exhaust system also needs to be replaced and a more efficient fuel injection system is installed, with a new fuel pump and more efficient injectors. Larger turbines require improved cooling, so changes are also made in this area.
This step also pushes the limits of the gearbox. That is, the manufacturer has installed an electronic limiter that prevents it from producing more than 1000 Nm of torque, so the limiter must be removed in order to maximise the increased power efficiency of the engine. It is not easy, but StartLine Motors does the job and has the key to unlocking the gearbox.