Just got some info from APR. They started production on the Carbonio carbon fiber cold air intake for the 2006 S4 this week. They expect it to be out for purchase by end of this month!! Combine the cold air intake with the ECU upgrade and a milltek full exhaust and you get one bad ride!!!

 

I just got info from Carbonio about a carbon fiber CAI for the B5 S4 as well,
It should be out 4-6 weeks, as I get notification / info , I'll post it too !