It's real. I'm surprised you've never heard of it, it's old news. The motor is all custom machined, and its almost 5 liters. And he said it can TAKE 4000 hp, not that it makes 4000 hp. But, a 4.8L, twin turbo, on nitrous, alcohol and nitromethane, is going to make some serious power.
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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