I am new to owning a Audi and have come to find out I picked a Model that has very unique parts compared to most Audi's. I have a 2001 A6 4.2 with Sport Suspension. I recently went through hell trying to find front brakes for the car. I came to find out that each frount wheel took 4 brake pads for a total of 8 pads in the front. I am getting ready to do the back brakes and they look like the normal 2 pad per wheel set up. I am also looking at upgrading all my rotors to crossed drill vented rotors. I am doing this cause I drive in the mountains a lot and I want to keep the heat down. What I am looking for is any information on the size of my rotors for the front and rear. I have seen 3 different sizes for the front and 3 different sizes for the rear. I am also insterested in knowing where I could buy these rotors. Besided having a little trouble finding brake parts I love my Audi. Thanks for help everyone.