MP Style Carbon Fiber Rear Bumper Diffuser F80/F82MP Style Carbon Fiber Rear Bumper Diffuser For BMW F80 M3 F82 M4 Coupe F83 M4 Convertible (20142020) Take the rear end of your BMW M3 or M4 to the next level with this MP Style Carbon Fiber Rear Bumper Diffuser. Designed to enhance both aesthetics and aerodynamics, this diffuser brings an aggressive, track inspired look while maintaining OEM level fitment and finish. Available in your choice of wet carbon fiber or dry carbon fiber construction, you