I bought a set of Brembo Xtra discs and noted that the discs for the right and left hand sides of the car are the same. Shouldn't cross-drilled discs be directional?
Brembo Xtra discs are not directional. The hole pattern does not have a mandatory direction of rotation as it is designed to work correctly and deliver precisely the same performance and comfort irrespective of the side of the vehicle the disc is mounted on.
This is a solution that has been adopted in recent years by many carmakers for the sports versions of their road cars, as it allows the use of cross-drilled brake rotors to improve initial bite and disc cooling without having to use specific discs for the left and right hand sides.