I have just finished developing a sprint car for Flightgear.

Download link: https://github.com/FGMEMBERS/Sprintcar
Please make sure you have installed the latest Addon folder: https://github.com/FGMEMBERS/AUCAFLYCORE
Note: Due to some issues in my personal life, I have to abandon all my future projects. I will still appear on the forum from time to time, but do not expect me to release anything new anytime soon.
Regards,
Ross