ProMatrix Rotor& Caliper Relocation upgrade kits offer measurable brake performance improvements to racers and enthusiasts using the OE factory brake calipers. High strength aluminum relocation brackets increase caliper torque radius .Two -piece directional vane SRP rotors kits provide high temperature durability for the track. SRP drilled and slotted black e-coat rotor kits provide high-tech style with corrosion resistance, durability, and firmer response with reduced deflection under load.