The R1 Concepts Geo-Carbon drilled-and-slotted rotor is a GeoPerformance replacement rotor for front and rear service on 2012–2019 BMW 640i Gran Coupe applications. It features drilled holes and machined slots intended to help maintain a clean pad contact area and consistent rotor surface characteristics for the listed model years without making unsupported performance claims.
DFC 12-19 BMW 640i Gran Coupe Front & Rear Drilled & Slotted Geoperformance Rotors