A bigger turbo would make more power, better engine management would make more power, different intake manifold would make more power...I could go on. You will not be making 250 whp at 8psi.
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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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