It will feature 35 new racing and skill tracks, 50 new physics objects, additional tournaments and 50 extra achievement points for 400 Microsoft Points (£3.40).
The content will be available to download from December 23.
RedLynx recently released a teaser trailer for the pack.
Trials HD was released earlier this year as part of the Summer of Arcade promotion.
> Click here to read our full review of Trials HD
