I do on ordering of ring and equipment for setting of loud speakers.(aluminium) Do you apply it in the installations in a car?

I have a 2008 Pontiac GT GT that I was attempting to install my Zapco 16.2 6.5in midbasses into today, and i ran into a snag. The OEM speakers were built into a plastic bracket that extended the speaker out and angled it a bit towards the center of the car like so I was told that these...