A catalytic converter and muffler including a housing having an inlet disposed between a first end and a second end of the housing to introduce exhaust gases into an inlet chamber. A plurality of first exhaust treatment banks disposed between the inlet and the first end of the housing to allow the exhaust gases flow towards the first end from the inlet chamber into an end chamber. A mixing tube to direct the exhaust gases towards the second end from the end chamber into a flow distributor and a plurality of second exhaust aftertreatment banks and flow into an outlet chamber. At least one resonator chamber defined within the housing to attenuate noise in the exhaust gases.