New trailer ahead of launch
The open world of Forza Horizon will journey off the beaten path tomorrow, December 18 with the release of the Rally Expansion Pack (1600 Microsoft Points). Free for season pass owners, this downloadable content adds five vehicles, mulitplayer rally and career events, and Rivals challenges, among other things.
Using rally-minded parts, players will be able to customize any of the vehicles in Horizon for off-road use, so you aren't restricted to sticking with those five cars for the purposes of the Rally Expansion. For more specifics, head to the official website.