I've heard the 6 cyl split manifolds but with the wrong mufflers, they sounded like *****. Ours are already split but all the exh. gets combined in one turbo. I think even with 2 turbos(1 front and 1 rear)you wouldn't hear each cylinder like the split 6 gassers. I think the turbos would still blend the sound together, much like they do now. Craig