1. Increase stability: The rear lip cover and spoiler can improve the stability of the vehicle when driving at high speeds. They can reduce the resistance of airflow to the bottom of the vehicle, provide better downforce, and make the vehicle more stable when turning. 2. Improve fuel economy: The rear lip cover and spoiler can reduce air resistance and improve the aerodynamic effect of the vehicle. By reducing the turbulence and resistance of the airflow, they can reduce fuel consumption and improve the fuel economy of the vehicle. 3. Enhanced handling: The design of the rear lip cover and spoiler can improve the vehicle's handling performance. They can optimize the aerodynamic characteristics of the vehicle, provide better downforce and traction, making it easier for the vehicle to turn and drive. 4. Enhance appearance: The rear lip cover and spoiler can add a sporty and dynamic feel to the car. They are usually designed with unique shapes and styles, which can add a personalized appearance to the vehicle and attract more attention.