An injection apparatus includes an injection mixing platform located within an exhaust pipe; wherein the injection mixing platform includes two or more mixing blades extending radially from a common central hub, at least one of the mixing blades being coupled to a DEF inlet to receive DEF from an external tank, wherein each of the two or more mixing blades includes at least one nozzle to eject the DEF into an exhaust stream, the two or more mixing blades being statically mounted to an inner surface of the exhaust pipe.