Some tuning parts in Gran Turismo 7 are components that can be installed and uninstalled as much as you like, while other tuning parts make permanent alterations to your car’s engine or bodywork. If you go to your Garage and select Car Settings, you can see settings relating to removable tuning parts in the first three and a half columns of the settings sheet, while the last two sections of the fourth column — Engine Tuning and Bodywork — list tuning parts that are permanent. The only way to undo a tuning part listed as installed under Engine Tuning or Bodywork is to completely replace your car’s engine or body respectively.
Related: How vehicle tuning and car customization works in Gran Turismo 7
So, engine swaps are in GT7, but they are normally limited to replacing a tuned engine with a new non-tuned engine. When you install a New Engine (available under the Extreme tab of the Tuning Shop once you’ve reached Collector Level 7), you don’t get to keep the old tuned engine. The point of buying a New Engine tuning part is basically to reset your car’s engine to its factory defaults. You might want to do this to get your car under a certain PP limit, but we’d suggest using a Power Restrictor instead. It’s much cheaper, and its effect isn’t permanent.
However, if you’re very lucky, you might get an entire engine as a reward from a Roulette Ticket, and that engine might be compatible with cars other than its own. Under these very rare circumstances, you can actually perform an engine swap in the truest sense i.e. replace the engine of an ordinary car with one from a much more powerful car. For example, the engines of some Porsche models are compatible with Volkswagen Beetles.
