A few years back, the Engineering Director of Ford had the police show up at his house. Fortunately, this wasn't the kind of incident that would afford him a Netflix True Crime original. No, his neighbours simply found his Mustang Shelby to be too loud.
This brush with the law got himself and fellow Mustang engineers to thinking -- there had to be a way to make the exhaust quieter in the next generation of Ponies. There was, and they called it Quiet Mode.
But for Mustang fans out there who appreciate the roar of the engine jumping to life, that hasn't been stripped out. In fact, Aussies in particular wanted the 2018 Mustangs to be louder. Suffice to say, it's been a complicated journey.