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My friend at a local muffler shop told me that an x-pipe would not be good for my z because they are for true dual exhaust whereas the 300zx has the y design. But I have seen many people with the x-pipe, could someone explain to me how it would or would not affect it? I know there has to be a certain amount of backpressure and the x-pipe may give too little backpressure. Thanks.
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