A mixer for mixing an exhaust flow with a fluid injected into an exhaust pipe includes a first mixing element including a base interconnecting first and second sidewalls and a deflection element positioned to be impacted by the injected fluid as well as a mixing fin positioned downstream of the deflection element. A second mixing element includes first and second spaced apart mounting flanges fixed to inner surfaces of the first and second sidewalls. Alternately, the mixer includes first and second mixing elements positioned within circumferentially spaced apart slots axially extending from an open end of a tubular housing.