As mentioned on Capcom’s official blog Super Street Fighter IV costumes are now available to download via Xbox LIVE.
Costumes of your favorite Street Fighter characters will cost you 320 Microsoft Points to download. You can dress up your avatars as Chun Li, Ryu, and many more of the Street Fighter gang. There will also be black SSFIV shirts you can download too for only 80 Microsoft Points.
Check out some of the cool outfits you can get: