DescriptionIn spring 2012, Ford launched an update to the Mustang line as an early 2013 model. The Shelby car GT500 has a new 5.8 L supercharged V8 producing 662 hp (494 kW; 671 PS). Shelby and Boss engines came with a six-speed manual transmission. The GT and V6 models revised styling incorporated the grille and air intakes from the 2010–2011 GT500. The GT's 5.0 liter V8 gained eight horsepower from 412 hp (307 kW; 418 PS) to 420 hp (313 kW; 426 PS).