Stoptech (Centric) Premium High-Carbon Slotted Rotors for 2016+ Ford Focus RS

[From the manufacturer...]

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
StopTech 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.