Two versions were released in the US. Besides the Unrated Version, 20th Century Fox came up with an R-Rated Version (for violence, language, some sexual content/nudity and brief drug use) exclusively for some US video stores like Redbox. But this time it's freaking weird because the R-Rated Version of Street Kings: Motor City is longer. A plot scene that couldn't be more trivial has been added to the R-Rated Version (or removed from the Unrated, depending on your POV).