The Porsche Carrera GT was built from 2004 to 2006 and is famous among car fans for its 5.7 litre V10 and manual gearbox. That engine traces its roots to a Formula One project and a Le Mans prototype that never raced, which explains the unusually high, musical exhaust note for a road car. Clips of the car revving and accelerating became staples of car YouTube, forums and racing games culture, and the sound is now used far beyond supercar videos as a shorthand for extreme speed.