I got a 2010 Maserati Gran Turismo S Forza Edition from wheel spin, and shared a tune for it.
This was actually a bad car since FE are maxed out with overkill upgrades that you can't change at max S1 900 PI. I looked through the list of recommended tunes at S1 and nobody managed to make it competitive, all unchanged upgrades because its already maxed and bad tunes.
Most upgrades cannot be removed, but this car had overkill handling and traction for S1, so I swapped out race tires for offroad, freed some PI for power upgrades and tuned it for road use.
Tested it on both wheel and gamepad, I actually tried unbeatable on gamepad, managed to match AI's best lap of 58s on the same circuit as the gamepad test on Pro in the video, but couldn't overtake.
This tune besides being competitive is great for a default freeroam car, fast with good handling, responsive turning, can go offroad for shortcuts and barn finds, can drift endlessly on offroad during skill songs.