Tuning has come to Gran Turismo 7 and if you want to be competitive in Sport mode then you need to learn it, starting with this video.
0:00 Sport Mode Requirements
0:23 Getting Your Car Ready For The Daily Races
1:23 A Different Approach To Tuning
2:22 Why Is 295HP Faster Than 295HP?
3:18 The Formula Digital Celica
3:40 Competing In Sport Mode
3:50 No BOP?