the r32 brakes are bigger, i emailed a bloke from awsome gti and asked about the r32 brakes and he said as they are 345 they will not fit under 17 inch, but the 3.2 v6 rides on 17 inch alloys! im pretty certain that it is 312mm have a lok on that site, it shows all the discs being 280 288 n the s3 is 345 n there is one 312mm disc