For 2012-2018 BMW F30 F35 3-series 328i M-Sport or Mtech Bumpers & Single Muffler dual Out. Title: Lower Rear Bumper Diffuser Lip Decor. This shark fin diffuser designed to increase a vehicle's aerodynamic performance.Reduces car's drag and increases down force.Reduce the airflow into the bottom, improve the steady of vehicle during fast driving.
