ECS Stage 4 Big Brake Kit - Black Porsche Cayenne 6 Piston Caliper-Slotted Rotors Audi B6 S4 V8 352x32mm (13.9") 2 piece rotor - Kit: includes lines, pads, calipers, ATE fluid, 2 piece rotors Another ECS Tuning Exclusive. ECS Stage 4 Big Brake kit for the S4 and B6 A4 features the Porsche six piston Cayenne calipers custom 352x32mm directional vane rotor rings lightweight 7075 aluminum rotor hats and a new bracket-less caliper mounting system. A new simpler mounting system means you can go from stock to high performance stop in a Saturday afternoon. Complete Kit Includes: 6 Piston Monobloc Porsche Calipers OEM Porsche Pad Hardware Hawk Brake Pads - High Performance Street Compound ECS DOT Approved Stainless-Steel brake lines ECS Custom Caliper mounting hardware ECS Lightweight 352x30mm 2 piece directional rotor Been looking at the above, and been speaking to N8KOW who seems to recall some people thinking that they bolt straight onto an 8P A3. Can anyone shed some light? Or will custom carriers need to be made up?