RS-4 does not have a twin turbo, unless its been modded....and I don't think that kit exists for them. They quit making them in 2008. BUT it may have been a RS-6 which was a twin turbo. Audi's are great under warranty, once that ends.....get ready to pay. The RS-4 is a great car that requires carbon cleaning every 10K miles or so....or the valves get all clogged up with goo. I won't buy another Audi till they get their problems solved about carbon junk on their direct injection motors. All of their DI motors seem to have the problem.
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