I have a 2004 A4, 3.0, 6-speed, Quattro. Wanting to upgrade the stock B6 A4 brakes and am wondering whether there will be an ABS issue or Master Cylinder Bias issue if the B6 S4 rotors and calipers can be bolted on??? Or is there a better solution? Not needing full performance brakes, but might do a track day event now and then... Thanks for any advise!

Thanks QF! I had heard that the b5 s4 brakes or calipars mounted iwith the stock carriers, just haven't heard until now that the b6 s4 brakes mount to the stock carriers. Thanks! Great looking car! Looks just like mine, less the wheels!