EBC Turbo Groove Rotors are precision CNC-machined using quality grey iron castings. Sold in pairs, Turbo Groove Rotors feature a combination groove and blind hole design. The blind holes resist cracking and help surface degassing under heavy brake load. The grooves promote flat pad and disc wear and help clean debris and dust from the braking surface. Rotors are zinc plated and gold passivated to prevent corrosion in areas not swept by the pad. The combination of Greenstuff pads and Turbo Groove rotors will yield large gains in braking performance at a reasonable cost.