When you were at SEMA, did you see any three inch cut outs, AND, would it be feesable to run these on a turbo motor or would it just screw up torque numbers as it needs the longer runners to function properly (I'm guessing)
Tought you would maybe like, I found this for my supra, could give you an idea to custom built one. It's a divroced wastegate downpipe, go straight to atmosphere when running at full boost but you probably already know don't know what your setup looks like, maybe would'nt work.
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Vince
Boost inside, better luck next time!