Mixing plate providing reductant distribution

A system for mixing a reductant with engine exhaust, the system comprising:

• an exhaust flow created by a vehicle engine;
• an injector positioned within the exhaust flow and having a plurality of ports for discharging reductant into the exhaust flow;
• a mixing plate positioned within the exhaust flow downstream of the injector and comprising:
• a plurality of arms each having a surface area and extending from a center of the plate;
• a barrier region, defined by the collective surface areas of the arms and substantially centered on the plate center, for diverting fluid flow outward;
• a first tier of cut-outs, each defined by an outer edge between adjacent arms;
• a second tier of cut-outs, each defined by an inner edge proximate an end of each arm;
• wherein a distance from the center to a closest point of first tier cut-outs is a first distance and the distance from the center to a closest point of the second tier cut-outs is a second distance, the first and second distances being different, and the surface of each arm being angled relative to a plane connecting the center and an outer edge of each arm;
• wherein each of the plurality of ports is aligned with each of the plurality of arms.