4 10"s under the rear seat, Silverado ext cab

[Amir09]

Hey man I have a question for you. I got a 2006 1500HD silverado.. I have 2 12" powerd by a 2000watt amp,kenwood and crunch,I am going to lift my back seat so I can port the box.. My idea was to build an open chamber box and put 2 ports on the bottom of the box on each side? I would like an opinion on this.. also when u lifted your seat how did you secure the back of the seat so it wont fall forward? Did you have to do some frabrication or was it as simple as lifting the hooks where they hold on? Thanks alot..