Hmm i see i see. My plans are to run my headers off with 2.5" to a Y into a Flowmaster, then out the muffler into 3' with another Y and fake duals out the back. I like the idea of the back pressure all mixing rather than the true dual idea.
I just thought the dump would be kinda cool because it would be closed almost all the time, but I could open it, even just partially at the dunes for a quick climb or drag race against some buddies.
UPDATE!!!: The guy thats building my engine just told me that the guy hes building one for in front of me is having trouble with paying or something so he called the machine shop and moved my stuff to top priority and should be done this week sometime. So if my tailgate worked.... lol i could throw it in the back and bring it to zimmers build and greet. Haha just kidding but that would be funny. Im really excited now, my brother wants to take my truck to prom, so now it could be a possibility for him to do some burnouts with his lady in it lol.