Bhai, if you go back to previous pages, you will find larger subwoofer enclosures with more weight ...
In this process, multiple aims were achieved.
Replace the SPL ported enclosures with SQ sealed enclosures.
The previous ones needed to be strapped into place due to awkward center of gravity. Now the new ones have much better center of gravity which will avoid tipping over of the enclosures due to off center center of gravity.
Another achievement was to make more trunk space available. Previously the available width in the trunk was about 25 inches. Now with the present installation, the available width in the trunk is not less than 36 inches. Theoretically that should make my wife happy while preparing luggage for traveling.