Thanks a lot for this Mhousse. I’m new to game engines in general (leave alone UE) and this helped me learn a lot. Nothin’ beats learning from a Bluprint Project firsthand 
I don’t wanna nitpick, but I’d like to suggest a small correction to Karting Game Template. I’m not sure if someone’s already pointed this out, so here goes. When you’re goin’ in reverse, the Turn Torque must also be reversed. Perhaps comparing current velocity with Forward Vector to make out if it’s on Reverse…unless there’s a more elegant way.
Regards,
Surya Sel.
[PS - This post had an image earlier showing a fix, but I removed it as it wasn’t complete]