An emissions cleaning module comprising: first and second support members (50, 60) each having first, second and third openings (51, 52, 53, 61, 62, 63); a first conduit extending between the first and second support members (50, 60) and having an inlet and an outlet, the first conduit being arranged in registration with the first openings (51, 61); a second conduit extending between the first and second support members (50, 60) and having an inlet and an outlet, the second conduit being arranged in registration with the second openings (52, 62); a third conduit extending between the first and second support members (50, 60) and having an inlet and an outlet, the third conduit being arranged in registration with the third openings (53, 63); a first end coupling fluidly connecting the outlet of the first conduit to the inlet of the second conduit; and a second end coupling fluidly connecting the outlet of the second conduit to the inlet of the third conduit, such that a continuous fluid path is provided between the inlet of the first conduit and the outlet of the third conduit, wherein the support members (50, 60), conduits (10, 20, 30) and couplings (15, 25) are arranged in a manner in which relative substantial translational movement thereof is restricted and wherein at least one of an oxidation catalyst, a particulate filter, a selective catalyst reduction catalyst and an ammonia oxidation catalyst is disposed in the fluid flow path; characterised in that the emissions cleaning module further comprises a first brace and a second brace each extending between the first support member and the second support member in a direction parallel to an elongate axis of each of the first, second and third conduits (10, 20, 30) such that the first and second support members (50, 60) and the first and second braces (70, 80) together form a rigid rectangular mounting arrangement which holds the three conduits (10, 20, 30) relative to one another whilst accommodating differential expansion and/or contraction of components relative to each other. first and second support members (50, 60) each having first, second and third openings (51, 52, 53, 61, 62, 63); a first conduit extending between the first and second support members (50, 60) and having an inlet and an outlet, the first conduit being arranged in registration with the first openings (51, 61); a second conduit extending between the first and second support members (50, 60) and having an inlet and an outlet, the second conduit being arranged in registration with the second openings (52, 62); a third conduit extending between the first and second support members (50, 60) and having an inlet and an outlet, the third conduit being arranged in registration with the third openings (53, 63); a first end coupling fluidly connecting the outlet of the first conduit to the inlet of the second conduit; and a second end coupling fluidly connecting the outlet of the second conduit to the inlet of the third conduit, such that a continuous fluid path is provided between the inlet of the first conduit and the outlet of the third conduit, wherein the support members (50, 60), conduits (10, 20, 30) and couplings (15, 25) are arranged in a manner in which relative substantial translational movement thereof is restricted and wherein at least one of an oxidation catalyst, a particulate filter, a selective catalyst reduction catalyst and an ammonia oxidation catalyst is disposed in the fluid flow path; characterised in that the emissions cleaning module further comprises a first brace and a second brace each extending between the first support member and the second support member in a direction parallel to an elongate axis of each of the first, second and third conduits (10, 20, 30) such that the first and second support members (50, 60) and the first and second braces (70, 80) together form a rigid rectangular mounting arrangement which holds the three conduits (10, 20, 30) relative to one another whilst accommodating differential expansion and/or contraction of components relative to each other.