The GT-Line Turbo represents the fastest and most feature-rich Kia Soul you can purchase. The first significant difference would be the inclusion of the 1.6-liter turbocharged four-cylinder engine that produces 201 hp. The exterior of the GT-Line Turbo gets unique 18-inch wheels, full LED lighting and color-coded side mirrors. The interior also receives a good amount of attention, and now features a sunroof, a heads up display system and a great sounding Harman Kardon premium sound system with a separate subwoofer and amplifier setup. The interior appearance is also given sporty touches with chrome door inserts, Piano Black air vent bezels and LED interior lighting.