So I'm trying to upgrade the front brakes on my 1988 Audi 5000s. I have a parts 5000s Quattro which has the dual-piston calipers on the front, whereas my non-Quattro has only single piston calipers. The brackets and calipers fit fine on my car, but the rotors are too small. I can't take the rotors off of my parts car because they have a 5 lug bolt pattern, and my non-Quattro has only a four-lug. I need rotors that are 276x25mm, but with a four-lug bolt pattern. Does anyone know of any cars that have that kind of setup, or where I might look to find out?