The 2020 2021 G80 M3 F82 M4 G83 M Performance Style Carbon Fiber Rear Lip Diffuser set with middle cover is an aftermarket car part made of carbon fiber designed to fit the BMW G80 M3, F82 M4, and G83 models. It is intended to enhance the vehicle's appearance by adding a more aggressive and sporty look to the rear bumper. The set includes a rear lip diffuser and a middle cover. The advantages of the 2020 2021 G80 M3 F82 M4 G83 M Performance Style Carbon Fiber Rear Lip Diffuser set with middle cover for BMW G80 G82 G83 models include: 1. Improved Aerodynamics: The rear lip diffuser can help to reduce air resistance and improve the car's handling and stability. 2. Sporty Appearance: The carbon fiber material and aggressive design of the rear lip diffuser can enhance the car's appearance, giving it a more sporty and aggressive look. 3. Lightweight: Carbon fiber is a lightweight material, which means the rear lip diffuser won't add significant weight to the car. 4. Durable: Carbon fiber is also known for its strength and durability, so the rear lip diffuser is likely to be long-lasting and withstand normal wear and tear.