i have a 3 l5 12" kickers in a dodge charger with a 4000 watt power accoustic amp and i want more boom for my buck and i know i need a sperate battery and/or capasitor and yess i am getting upgraded speakers and components but i want to know if i should port them by making theree custom port holes through back seat under the rear windshield or just keep in the trunk and the subs are in a fully enclosed trunk please some one help andonne other thing should i just coaxial speaker or speakers and components?