K well going to get some new brakes soon. Couple Q's i have is that i upgraded to the A4 3.0 size rotors in the front which is what? i cant find my sizes i saved somewhere. Also i have 2 front B5 S4 front calipers laying around and if i put thoes on will i have to go to the S4 rotor size? or can i put the 3.0 carrier on and put 3.0 rotors on? or well are the S4 rotors bigger then the 3.0? Any help would be awsome thanks.