If you are using the later model 8.4" rotors and always dreamed of a way to get a little extra braking power- this is your answer! Drilled and grooved 8.4" diameter as used on all late model Minis with 12 or 13 inch wheels. Sold as pair only, these rotors have been specially designed to improve braking and reduce brake fade. The rotors are handed left and right to maximize performance. Minimum thickness, 8.6 mm