I have one, and I love it. It makes good power, especially at high RPM. The only drawback is that it's loud, especially with a 4-1 header. The good part is that you can put the silencer in whenever you want and it will be super quiet.
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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