The roof spoiler lip for the BMW X5 F15 / F85 blends perfectly with the vehicle's design, making it more aggressive and sporty, which is especially important for the X5M. In addition, the roof spoiler serves to provide more downforce to the rear of the vehicle, which will undoubtedly affect the stability and handling of the X5. The spoiler is made of a very durable, wear-resistant composite material that is not afraid of temperature extremes or humidity. This spoiler matches the lower spoiler in the Renegade Design kit.