Originally Posted by Bobbybmw22
Thanks appreciate that is there a way of installing a diffuser on a non- m tech bumper
You asked how to tell if you had an M-tech bumper or not. I answered that. Given your response I take it as sarcasm. So much for trying to help a noob.
Only m-tech or m3 bumpers come with diffusers as OEM parts. You can't install a diffuser on a "stock" bumper.