Before doing anything, navigate to your F1 2020 installation folder (usually in Steam/steamapps/common/F1 2020). Copy the entire folder to a backup location. This saves you from re-downloading 30GB if something breaks.
While F1 2020 uses V6 Turbo Hybrid sounds by default, top-tier mods often include engine swaps or sound bank modifications to bring back the 19,000 RPM scream. Why Use F1 2020 as the Base? F1 2007 Mod F1 2020
Since Codemasters does not officially support mods (and EA has since tightened restrictions), installing the requires a bit of manual work. Follow these steps carefully. Before doing anything, navigate to your F1 2020