All modern vehicles have an ECU (Electronic Control Unit), which controls fuel, ignition, turbo pressure and much more.
When a vehicle manufacturer develops a new vehicle, they have to consider all sorts of regulations, climate and conditions in all countries.
Often the vehicle manufacturer has the same kind of engine in different models, with a wide range of power, where software is the only difference between models with more or less power. Reason they do this is to be able to have a wider range of vehicles for customers. In addition they do this to save production cost, where it’s more cost effective to remap a car from the dealership than to develop brand new engines for each model.
This is where we come in and is the reason why we can do what we do, within the specs the vehicle is built for.