The aftermarket cats come with heat shields...and the new carsounds are EPA/CARB OBD2 approved for CA...win-win situation.
Side note, when I got my CARB ticket for my intake and went to the BAR ref, I didn't have to pay the fine...just the fee for the smog and court processing.
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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
Team B.O.B.® - Ballaz on a Budget