Power Stop drilled and slotted rotors provide a bolt-on upgrade for improved brake cooling and performance. Precision cross-drilled for maximum cooling and maximum performance during extreme conditions; rounded slots sweep away gasses, dust, and moisture to keep a clean friction contact patch on the rotor surface. Silver zinc dichromate plating resists rust and corrosion. With a direct OE fit, there are no special modifications needed.EVOLUTION DRILLED & SLOTTED ZINC PLATED ROTORS (PAIR)Manufactured to strict tolerances for DTV and runout for smooth quiet performancePrecision cross-drilled for maximum cooling and optimum performanceChamfered drill holes and rounded slots to minimize stress crackingBolt-on upgrade for stock brakes, no modifications necessarySlotted friction surface sweeps away gasses, dust, and waterWeight and vane count match original equipment designZinc plated for protection against corrosion100% dynamic mill balancedSold as a pair