For years, achieving 400 km/h in ETS2 was a straightforward process. Modders simply edited the game's internal .sii configuration files—specifically targeting engine torque curves, transmission gear ratios, and chassis stability definitions. By injecting millions of Newton-meters of torque into a standard Scania or Volvo engine file, trucks could accelerate like Formula 1 cars.
non-functional for many players due to compatibility issues with recent game updates, specifically Version 1.58 released in February 2026 Truck Simulator Wiki Current Status of High-Speed Mods Version Incompatibility euro truck simulator 2 speed mod 400 km h patched