Forza Horizon 5 AMG One is faster with spoilers retracted

If you convert the Mercedes AMG One in Forza Horizon 5, it actually changes the performance characteristics of the car. With the spoiler down, the car reaches a higher top speed (around 270 with a custom tuned transmission). However, the downforce the car has is noticeably less and the car will go flying on the smallest bumps at high speed. I wouldn't recommend racing with the spoilers down. The default key to convert/retract spoilers on PC is "G". If you're on console, you have to go into settings and map it yourself as its unmapped by default.