With all that junk on there, we can't see what the problem was to begin with. If your cat is rusted out like he said, it's time for a new cat. But, we don't know why he put that stuff on there, or what it is.
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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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