The GiroDisc slotted rear ring for 2014–2020 BMW M2, M3 and M4 (F8X with red, silver or gold calipers, including CCM) is a 400mm slotted replacement friction surface designed to help maintain pad contact and channel gases and debris away from the pad. These rear rings fit specified F8X caliper variants; confirm caliper, rotor and pad compatibility prior to installation.

GiroDisc 14-20 BMW M2/M3/M4 (F8X w/Red/Silver/Gold Calipers Incl CCM) 400mm Slotted Rear Rings