The 2.0 B7 A4 brakes appear much larger in front and rear than the B6 brakes. Does anyone know if the B7 brakes will bolt on a B6? Any specs for B7 brakes?

That what they looked like to me. But, I've only seen pictures of the B5 S4 brakes.

more misinformation.

calipers are totally different

rotors are simmilar in size but may use a different offset since they dont have the same part number iirc.

"Audi reached into its parts box and pulled out the B6 platform S4 brakes for the front of the B7 A4"<ul><li><a href="http://www.audiworld.com/features/tests/b7a4.html">http://www.audiworld.com/features/tests/b7a4.html</a></li></ul>

B7A4 uses 321mm front rotors and 288mm rears. B6S4 uses larger rotors up front and out back