EA isn't letting its mega mobile racing franchise stagnate. The latest update to Real Racing 3 is version 1.3, adding iconic muscle cars from Dodge and Shelby. Four cars have been added to the roster: the 1969 Dodge Charger RT, 1971 Dodge Challenger RT, 1966 Shelby AC Cobra 427 (I think - going by a screenshot and some Wikipedia sleuthing), and the 1967 Mustang Cobra GT500.
According to the What's New text, there are also new events, new difficulty settings, tweaks to car physics and cameras, and "additional social networking options." Posters on the FireMonkeys developer forum say that means Google+ integration, as a G+ sign-in option has been added to the Settings page.