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