Dodge introduced the final generation of the Viper for the 2013 model year. Known as the VX I, the Fifth Generation Viper was initially marketed under Dodge's SRT brand as the SRT Viper, but from mid-2014, the cars were again sold under the Dodge name. The VX I Viper was only available in a coupe body style, and featured a front mounted 8.4L V10 engine. Initially, only the base SRT and premium GTS variants were offered, but soon a mid-level GT was introduced, as well as the performance focused TA and ACR. In 2015, a special custom program was launched giving customers access to a large range of colors and interior customization. These cars, known as the GTC, were equivalent to the GT, but the program was offered on all variants. Towards the end of production, a special final edition known as the GTS-R Commemorative Edition was also available. Production of the VX I Dodge Viper lasted until 2017, when the model was discontinued.