The package usually contains:

: Includes new cutscenes, rebalanced cars, and more territories to conquer. Cut Content : Restores originally removed content, such as the Toyota Supra and extra canyon events. Difficulty Tiers : Choose between Easy, Medium, and Hard modes for a tailored challenge. New Race Types

You must have the base game installed. It is highly recommended to use a "clean" install without other major overhaul mods (like Redux or Improvement Mod) to avoid file conflicts.