Old-gen version of the game will not be supported.
Turn 10 has confirmed that the DLC announced for Forza Horizon 2 is only for the Xbox One version of the open-world racer, and not content that will be released on the Xbox 360 version of the same game.
"I've seen a lot of questions from community members about certain features and functionality on the Xbox 360 version of the game," Turn 10's community manager, Brian Ekberg, wrote.
"To clarify: We are currently planning to release DLC only for the Xbox One version of Forza Horizon 2. Also, Forza Rewards benefits are only available in the Xbox One version of Forza Horizon 2. This means that Xbox 360 players will not receive Forza Rewards credits or cars.
"In addition, progress in the 360 version of Forza Horizon 2 does not count towards your Forza Rewards Tier Level score. Only progress in the Xbox One version of Forza Horizon 2 will count towards your overall Forza Score (and Tier Level) in Forza Rewards."
Forza Horizon 2 was launched on both Xbox One and Xbox 360 last week, although the games were actually developed by separate studios, with the new-gen version made by Playground Games, and the old-gen version made by Sumo Digital.
While it might not have swayed the buying decisions of old-gen racing fans, undoubtedly there's some who'd have preferred to have been forewarned that there were no plans to support the Xbox 360 version of the game beyond launch.