EXHAUST STACKS OUT OF THE BED! That is what I'm doing. I am just going with a single pipe and it splits to 2 once in the bed. I love the look and they sound so darn good on a gasser. I'm sure you could do dual all the way to the stacks but thats more work than i want to put into it.
I plan to make a diamond plate cover to cover up anything below the bed rail so all you see is the awesome stacks.