If you're getting a cat-back exhaust made, the resonator is behind the cat and will be deleted. The stock resonator is incredibly restrictive and I suggest to anyone to remove it when installing a new exhaust. If you were to install a new resonator with the new exhaust, it'll just quiet down the tone a bit....it is, after all, just a smaller muffler. Just make sure you get a straight through, perforated core resonator for unrestriicted flow.
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