So I got to thinking....my sister has a 2004 Touareg V6 which, as you guys know, has the 6 piston brembo brakes up front.

Here is what I know so far

Touareg Rotors:330mm x 32mm with a 5x130 bolt pattern
the OEM ones should work wit the S4 calipers even though they are 2mm thicker

S4 Rotors: 345mm x 30mm with a 5x112 bolt pattern
I plan on using the OEM rotors until I have funds for the 350MM JHM rotors. If anyone has a suggestion on some cheap 350x32mm rotors, please let me know. I remember reading somewhere that one of the Mercedes OEM rotors will work.

Calipers: Only issue here is getting the S4 calipers to mount up to the Touareg spindles. S4 calipers accept a 14mm bolt and the Touareg spindles accept a 16mm bolt. My current thought is to have a machine shop drill out the S4 calipers to accept the Touareg 16mm bolts