I picked up a 03 RS6 and was looking at some mods list.
I find it hard to believe that I'm having difficulty locating build threads for this thing(considering its been out for a long time). I guess I'm spoiled coming from the LS community where everything has been documented at every power level.

I'm looking for 550awhp to start and eventually move into the 700-800awhp later down the line.

aside from the basics.
Intake/full exhaust (or in my case im going with boost cutout)
chip/tune/raise boost
intercooler upgrade (or not as i don't have a problem injecting 50/50 meth)

What are some of the common routes that people take in upgrading this car?
Considering that I can't seem to find a turbo that will fit.

Thank You