Hi guys, I bought a set of Porsche Cayenne Callipers for my 2008 S3. But unfortunately I bought them before really reading into the set up. It look to be very costly and so much footering about to make them fit. Lots of custom stuff, and I just don't have time to get it done. I've heard that RS4 brake 8 pot upgrade is common on S3s so I might look into this, Does anyone know of where I can get adapters ? What size discs? Also I have 18" wheels if this is a problem? Do I need to upgrade my master cylinder, I've heard to use an RS3 master ? You might tell me to just buy AP racing kits etc, but I prefer to use OEM parts of other Audis. Any thoughts on this ? Thanks for reading.