Black Diamond XD Cross Drilled Discs are a tried and tested, drilled performance disc design, that not only enhances cooling but also reduces dust build-up, disc and pad surface contamination and prolongs friction and braking performance.Phosphate-coated motorsport quality sold in pairs.Precision-engineered cross-drilled discs improve friction and brake pedal feedbackSuperior manufacturing techniques improve performance and offer longer-lasting durability.Black Diamond XD Cross-Drilled Discs are engineered and made using computer-aided design and manufacturing to ensure they are finished to the most exacting standards.The 5 rows of cross-drilled holes expel heat and gases quicker than a normal disc and allow extra cooling. This means the pad is less likely to glaze over and more fade-resistant, while the rest of the brake system is put under less pressure from the cooler operating temperatures.The unique compound and heat treatment after machining combine to provide awesome braking per