Revealed in 2013 as an upgrade kit for the Mustang GT, the Shelby GT350 (S197 II) was built in limited numbers and was offered in both coupe and convertible versions. For the 2013 model year, the GT350 received new color options, visual styling cues, and optional performance enhancements. The 2013 Shelby GT350 is powered by a 5.0 liter V8 engine offered in either a naturally aspirated version with an optional upgrade to increase the power output to , or a or supercharged versions. The engine could be combined with a manual gearbox with a short throw shifter as standard, or an automatic transmission for the naturally aspirated engine as an option.