The 4th generation Dodge Viper was designated the ZB II and was built 2008-2010. Built in Detroit, MI USA. The cosmetics were much the same as the 3rd generation but 2008 brought about the 8.4L V10 engine. With the redesigned engine boasting 600HP the Gen IV also received an upgraded TR6060 6-speed transmission. Many components from the 3rd and 4th generation will interchange.