ProMatrix Brake pad and rotor upgrade kits offer measurable brake performance improvements to racers and enthusiasts using the OE factory brake calipers. High performance pad compounds are specially selected to provide increased brake response and higher resistance against fade. Two - piece directional vane GT rotor kits provide high temperature durability for the track. SRP drilled and slotted black e - coat rotor kits provide high - tech style with corrosion resistance for the street. Wilwood Promatrix pads feature specially selected compounds for enhanced performance through increased friction properties and extended temperature range.