The EBC BSD front rotor set for 2017–2020 Audi A4 (B9) 2.0T upgrades factory fronts with a V-slot design that improves heat dispersion and helps pads run cooler under frequent braking. BSD Series blends high-carbon, thermally stable construction with an ultra-quiet V slot pattern. Vented; 318mm diameter, 30mm thickness, 5 bolt holes; 68mm center; fits FMSI pad D1897.
EBC 17-20 Audi A4 B9 2.0T BSD Front Rotors