ok guys im new to all this and i need to know 1, what would it take to get a deville fast on bags (for a fbss setup) with nitrogen or what ever 2, how much is nitrogen cost to add to a setup 3, in the trunk where do all the air lines run.....if there was a custom sub box pushed up against the back seats and sealed off would that get in the way of any air lines......thanks in advance for any info