Originally Posted by Technic
I can lift the whole door panel by the R4 magnet after using Dynamat so this spacer should only be tighter.
The problem that I see with this is the availability of the R4 itself and not of the spacer. It is too frequently in backorder everywhere.
This particular step-lip spacer can be used in the E92 as well with any 50mm-or-below depth 4" mid. As long as the cone diameter do not exceed the lip diameter it should work.
Cool well hopefully however this turns out it ( making a CNC adaptor ) or just using old stock speaker brackets it helps the community..