Hello, there is a frame on the trunk of the car called the tail wing, which is technically called the spoiler and belongs to the aerodynamic suite of the car. The main function of the tail wing is to reduce the lift at the rear of the vehicle. If the lift at the rear is greater than the lift at the front, it will easily lead to oversteer of the vehicle, decreased grip of the rear wheels and poor high-speed stability. If my answer is helpful to you, please set it as the best answer. Thank you for your help!