Originally Posted by Shmoo
It could be a faulty exhaust manifold. I bought a DC sports header because of that noise. It turned out that the welds in the stock log were cracked.
Another common problem.
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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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