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. Kits contain one piece, directionally drilled and slotted SRP black e-coat rotors that 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. (-U kits are replacement rotors only and do not contain brake pads).