For Audi Q3 Q5 Q7 Q8 Gloss Black Rear Bumper Diffuser Spoiler Splitter Lip 6 Fin

【Reduce Air Resistance】This shark fin diffuser designed to increase a vehicle's aerodynamic performance.Reduces car's drag about 1.6% and increases down force.Reduce the airflow into the bottom, improve the steady of vehicle during fast driving.