Resonator and catalytic converter are two completely different things. A resonator is basically a mini muffler on the b-pipe. It quiets the exhaust and deepens it. If you take it off, you'll be louder and sound like a bumblebee.
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
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