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Blah dragon its not an argument.. every setup is different on exhausts. In a general sense, yes, true duals offer less back pressure allowing for more efficient movement of exhaust from the engine. BUT the cost is double what a single exhaust would be and the benefits are negligible in manufacturing (racing and performance aside) and when you talk about an economic engine, you don't toss on goodies to raise the price just for a few hp.. its a v6 option for a reason.
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