This Original Equipment Manufacturer part is the same part that was made & installed by the car manufacturer at the factory where the car was produced.
with 360mm Front Brake Disc Diameter or with 390mm Front Brake Disc Diameter
( Brembo Four Piston or Brembo Six Piston Front Caliper)
with Shims
They are sold as a set and only quantity 1 is required for both wheels