Right-click on Part 1 and select "Extract Here" using WinRAR or 7-Zip. It will automatically combine the other parts.
If prompted for a password, it is typically www.apunkagames.net . download-race-driver-grid-apun-kagames-part1-rar
Open the extracted folder and run the setup.exe file as an administrator. Right-click on Part 1 and select "Extract Here"
Once the installation finishes, launch the game from your desktop. System Requirements (Minimum): OS: Windows XP/Vista/7/10/11 Processor: Pentium 4 @ 3.0GHz or Athlon 64 3000+ Memory: 1 GB RAM Graphics: GeForce 6800 / Radeon X1300 or above download-race-driver-grid-apun-kagames-part1-rar
GRID from Apun Ka Games: