Large-scale navigation data for specialized vehicle head units are frequently named with version numbers like 1.63. 3. Scientific and Technical Datasets
In the gaming community, frequently stands for Gran Turismo or Assetto Corsa "Grand Touring" mods. GT1.63_2GB.part31.rar
The suffix .part31.rar indicates this is the 31st piece. To extract the original content, you must have all previous parts (1–30) and any subsequent parts in the same directory. GT1.63_2GB.part31.rar