ProMatrix Rotor Kits can offer measurable brake performance improvements to racers and enthusiasts using the OE factory brake calipers. These Rotor Kits, dependent on part number can be of one piece or two piece rotor and hat construction and offered in GT slotted or SRP dilled and slotted black e-coat rotors. Some kits are offered with high performance brake pads or stainless steel flexline kits.