Interested question from a non-RS4 owner, but curious...
#3
well, there's a remote turbo kit that would probably work.
I don't know if it would be possible to fit 2 turbos ahead of the firewall in this car.<ul><li><a href="http://www.ststurbo.com/home">STS turbo</a></li></ul>
#4
I am sure MTM will come out with something but it will be $$$$$
we are still waiting for any one else with a B6 kit to come out. APR and others have been working for almost 2 years on a kit but still nothing. So don't get your hopes up for anything in the relm of affordability.
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#10
Just a guess but the new RS6 may be available before a reliable turbo for the RS4.
Totally rumors but it "might" have a turbo version of the V-10. If you need a faster car now, you should probably look at the M5 or M6.