After the physical installation of the new fuel injectors has been achieved, you will need to modify three settings in the injector maps of the ROM file:
Maps by Function ⟶ Fuelling ⟶ Injectors ⟶ Injector Flow Scaling (RaceROM)
Original value: 570
New value: 975
Maps by Function ⟶ Fuelling ⟶ Injectors ⟶ Injector Lag Time Offset
Original value: 0.890
New value: 1.0
Maps by Function ⟶ Fuelling ⟶ Injector Minimum Open Time
Original value: 1.83
New value: 1.0
First check the box next to the setting, then on the pop-up window click Edit -> Fill Selection with Value, enter the new value and click OK to proceed. Repeat the procedure for the each of the settings above.
The following screenshot shows the maps after all changes have been made.