take it from the Powerstroke guy.. ME! stacks are the way to go. they are loud, trust me, they are loud. mine is 4" turbo back, with straight pipe into dual 5" turnout stacks. BUT be forewarned, Powerstrokes, because they are a V8 design do sound a bit "fluttery" with straight pipes, but i love mine.
i know its upside down, blame rattlesnake18 for that, but here is my 7.3 with its stacks. didnt take long to smoke the 35" tires. we were just trying to get some coal to roll (no chip at the time) remember this is 4" turbo back, straight pipe, into dual 5" stacks.
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