Dialled In Trophy
Win a race using a custom vehicle setup.
If you use the above method for Terminated! and win the race too, you will get this trophy, because tweaking the gear ratios is one of the customisations you can do. If you want to get this out of the way before then, make sure you turn car setup on in the pre-race menu, and when the car setup menu appears, change something quite small such as lowering the ride height one notch, win the race and the trophy will pop.