Michelle Bongiovanni’s classmates at Penn State did not believe her, and it is hard to blame them. She spends weekends running eight-second quarter miles in a Mustang that Ford builds specifically so it cannot be registered for the road. The Cobra Jet is one of the strangest things a manufacturer sells: a factory-built drag car with no VIN for street use and no pretense of being anything else. Read on to find out how a Mustang ends up like this.