BMW M135i F20 F21 Rear Bumper Fin Insert Diffuser - Matte Black (2011-2015). Includes four fins. The fins attach to the rear orginal diffuser, you do not have to remove the diffuser like a lot of the others. These fins add aggression to the diffuser. Comes with everything you need to install, the double sided tape provided is really strong. If correctly installed the tape wont leave a permanent mark on the diffuser, this is delivered to you with the tape already on the fins. They can be drilled in for extra support if you would like. The fins hook over the inside of the diffuser for more support.
Free First Class postage in the UK, dispatched same day should be with you in 2-3 working days.
Message us if you have any questions about if it fits your model or not, we do have a couple of different colour options available if you are interested.