Hi all. I want to thank everybody for helping me. On my S4 1992 I have the Ufo brakes; in the last year I had a lot of problems: warped rotors (changed 5 or 6 times), vibrations etc. etc. Now, finally, Audi is gaving me free substitution with a traditional system. Thanks to all and to Audi. Regards, Theo Malpassuti -- TiscaliFreeNet, libero accesso ad Internet. http://www.tiscalinet.it