Hi!
At some point, this + the ELC rally car sounds were separated into optional files, but they have been included in the default download to simplify the install process. That being said, I am thinking I will split them off into a separate download after the next update, since I have seen several comments on this (and I have realized that removing the optional files after every update is not exactly convenient 😅).
In the meantime, these can be disabled by navigating to <Your WoT install location>\mods\configs\PYmods\soundEventInjector\configs\ and removing these two files:
Gnome_Zorg_OPTIONAL_ELC_engines.json
Gnome_Zorg_OPTIONAL_KV-4_Steam_Engine.json