Game has the rear aero locked when in real life its adjustable.
Screenshot from an interview with Corvette chief Tadge Juechter with GM Authority back in 2017.

Link to Article here:
https://gmauthority.com/blog/2017/12/feature-spotlight-the-2019-c7-corvette-zr1-makes-1000-pounds-of-downforce/
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Due to risks associated with changing car performance, gameplay behaviours and impact to other players, we are not considering making any changes unless a certain car modification/performance results into a game-breaking event such as client crashes or heavily disrupting gameplay scenarios.
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