Karbel Carbon Fiber Rear Diffuser w/ F1 Light – BMW G16 8 Series Gran Coupe This diffuser features an integrated F1-style center light, giving the rear of the car a much more aggressive and premium appearance. The diffuser is used and in excellent overall condition. It has a very slight amount of damage, which is practically unnoticeable once installed. The carbon fiber finish still looks fantastic and presents very well.