Hi! First of all, thank you for this mod! I really love it.

I have a suggestion:
I'm not sure if this is out of scope or not, but with these engine boosters, a brake-power/force module would be cool to shorten braking distances for cars, tanks, or even trains. I haven’t found any mods that do this yet, so it might not be possible.

Definitely out of scope for this specific mod, since the engine speed booster's only purpose is to replace the exoskeleton legs equipment in vehicles.

As for creating this as a new mod... there's no brake force equipment type, so it can't be done natively, and as far as I can tell, the braking force of a vehicle is not an editable property during runtime, so there's no way to specify one vehicle having a different brake speed from another vehicle of the same type. Train braking force technology also only applies the bonus to trains, and can't be modified to apply to other vehicles, as far as I could tell.

So unfortunately, I don't believe this is possible.

Ooofff :D
anyway thanks for checking it out!