Mustang’s 2 keys change pony car’s performance settings: The new Mustang has two keys that, when used to start the car, set the engine performance parameters. One is for when you want to tool around town (or when your kid borrows the car). The other is when you want to do illegal stuff.
But this second key — colored red, of course — is the first to amp up performance for racing.
The development shows how sophisticated computer software controlling all functions of a car — engine, transmission, brakes and more — is creating new possibilities for the industry. In this case, the two keys give the Boss a Jekyll/Hyde persona.