While this version is used for save-swapping, the update itself actually patched car collection exploits that previously allowed players to buy cars directly from the collection screen instead of the Autoshow.
The "story" for a Forza Horizon 5 1.405 usually refers to a downloadable 100% completion save file forza horizon 5 1.405 save game
Watch these tutorials to see the step-by-step process for save swapping and achieving 100% completion: While this version is used for save-swapping, the