This Carbon Creations SM - G Rear Diffuser is designed for 2013 - 2017 Audi S5 owners who want to upgrade their car's look and performance. It's perfect for both daily drives and track days. The diffuser is made of carbon fiber, which is light yet strong. As for the size and weight, it's engineered to fit your Audi S5 B8 precisely, but specific figures are not provided. It will enhance the aerodynamics of your vehicle and give it a sportier appearance.