What if an evil guy does very unnoticable changes to the game files, like increasing nrg500 speed by 1? How the mods are going o tell if the game is modified?

But do our current mods have vehicle mechanics knowledge?

Even if they don't, someone else who does can notice it and report it to them.

@leshenka nrg500 is used in speedruns many times, and if there is a case where one has to go a far distance with a nrg500, a speed increase by 1 can be very impactful