And here's another link to see the details of the build. Even this isn't for the faint of wallet, and if this is cheaper than doing a custom turbo setup on a 2.8 (except for doing a remote turbo of course), then you'll see why everyone says just sell the A4 for an S4:

http://forums.thecarlounge.com/zerothread?id=3400963

 

They ended up with ~650awhp out of that monster.

You could also track down an S4 that took a hit in the *** and swap everything over.

 

^yep, 647Awhp at not 30, but 40 psi!!!!

could easily get some more out of that with a 24v head and slightly larger turbo.. and even more boost of coarse

 

i wish i had extra money for a project car. 3.2 24v vr6 + GT40R in a b5 a4 would be pure sex on wheels. there's a TT with that setup making 511whp....on 14.5 psi[sm=jawdrop.gif]

 

I saw that one at Waterfest. Sick car.