Its not at all difficult to remove the OE diffuser, there are several screws along the bottom, and the clips come out with modest force. Just be careful about how you pull on the clips, the bumper flexes with it. Take your time and its simple. There are multiple high quality cf diffusers out there.
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E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP
F30 N55 XDrive EBII
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