It would be nice to have one place to showcase all the different brands and color combos of diffusers for our cars. This could be a one stop showroom for anyone searching for which diffuser to buy.
*Edit: Also, please keep picture-less text posts and picture quoting to a minimum
So post a picture of your setup along with what it is -
I'll start for a control and comparison. Stock diffuser on a 2011 135i:
I searched for 20 minutes and couldn't find a thread like this, let me know if I missed it and I'll delete