1Replacement for MercedesBenz CLAClass C118 2020+. Replacement for MercedesAMG CLA 35 C118 2020+. 2When driving, pressure is applied by the airflow of the body to increase the traction of the rear tires and improve stability at high speeds. 3Using aerodynamic performance. Reduce drag, improve fuel efficiency, increase downforce. 4Adopting mixture of highquality glass fiber and ABS engineering plastic, it is durable. 5With doublesided tap. Direct replacement installation, no complicated tools required, convenient for using.