Audi A4/S4, A5/S5, B8 - Set of 3" Dash Speaker/Tweeter Adaptors Rings Spacers
I allowed for a fairly large basket behind the speaker. for Audi B8 A4/S4/RS4. 3" Speaker Adaptors Rings. They can be bolted in to the original 2 mounting points and have 4 screw holes to mount the speaker to the ring.