A4 Quattro Sedan V6-2.8L (ACK) (1997)
Brake Caliper: Specifications
Front
Teves
Front Brake caliper piston diameter .................................................................................................................................................. 57 mm (2.24 in.)
Double Piston
Front Brake caliper piston diameter ................................................................................................................................................ 42.8 mm (1.69 in.)
Rear
Lucas
Rear brake caliper piston diameter ............................................................................................................................................... 3.81 mm (1.500 in.)