The 2017+ Giulia QV utilizes a solenoid/vacuum controlled exhaust valves that allows the center (2) exhaust exits to become active allowing for a more efficient and more aggressive exhaust note.
These (2) center exhaust exits becomes active in stock form when "Race Mode" is selected.
In order to always have this "Race Mode" option would require software changes in the body control module or by directly unplugging the solenoid which may...