So far I've seen the only street legal turbo (from Hahn) for Manuel only. Is there a turbo or SC for Auto?

 

You can use any turbo for automatic transmissions. There kits fit automatic transmissions. You will just need to find a way to tune for it.

 

You need a tune on a turbo? I though you just install it. Also, Hahn's says its a manuel only, whats up with that?

http://www.turbo-kits.com/cobalt_turbo_kits.html

The 2.2 L turbo, says MT only.

 

You need to tune your car for it to run correctly with a turbo installed on the engine. Also you need to tune the automatic transmission to shift correctly with the added power. They list it for manual only as the tunning included if for manual transmissions as it does not include a automatic tune. Psychically it will fit your car without problems, you just need to get it tuned properly which i believe ClearImage can do for you.

 

x2 ^^^^^^^^^^^