2013 Chevrolet Z06
2017 Chevrolet SS (Holden)
4th and 5th Gen Camaro SS
S197 Mustang GT 05-14
05-09 Gt500
09 Cadillac CTS-v
Dodge Demon170
Chrysler 300 Hemi
Dodge neon srt4
03-04 terminator cobra
2000s Pontiac GTO
Better supercharger/turbo sounds. Whistle for centrifugal and whine for roots
Anti lag, 2 step, launch control with flames. Ability to adjust boost
More exhaust options
Ability to get smaller wheel size for a drag radial setup
All of these would be great things to add into forza 5 in my opinion.