Better check your info on the S4 again; it has 4-pot calipers in the front. Regards, -mark nelson mailto:tahoe@msn.com http://www.quattrosport.com > I know that the S4 and TTs both use new 12.8" 2 piston brakes. Aren't > two pistons a low number for such high performance brakes? How do they > provide so much stopping power? Will they be available for aftermarket > (i.e. for an A4.)