Detroit Show 2012 Highlights: 2013 Ford Shelby GT500 Convertible

The ultimate soft-top Mustang has been revealed at the Detroit motor show. The Ford Shelby GT500 is mechanically identical to its equally hardcore coupe sibling revealed at the Los Angeles motor show last autumn, with the addition of a folding fabric roof.That means power comes from a 5.8-litre supercharged V8 engine, which produces a lofty 650bhp and 600lb ft. Ford says every part of the