StopTech Slotted Sport Rotors are 1-piece direct replacement brake discs for factory brake systems and stock calipers that look great behind your wheels – and offer significantly improved braking performance. The unique slotting aids with heat and brake dust dispersal; prevents glazing of the pads; adds bite and improves wet and dry braking performance. Built to last; the black e-coating provides protection from corrosion and the high carbon metallurgy (in most applications) offers quieter operation; better crack resistance and increased performance. Premium e-coated rotor with advanced metallurgy that greatly reduces pad squeal. Especially effective with higher friction, European style brake pad compounds. Slotted for increased bite, improved looks and better performance 2010 - 2015 BMW 550i GT, 2010 - 2017 BMW 550i GT xDrive, 2009 - 2015 BMW 750i, 2010 - 2015 BMW 750i xDrive, 2009 - 2015 BMW 750Li, 2010 - 2015 BMW 750Li xDrive