Off-road vehicle

A vehicle, comprising:

• a frame;
• front and rear ground engaging members supporting the frame;
• a powertrain drivingly coupled to at least one of the front and rear ground engaging members, the powertrain comprising an engine and a transmission, the engine comprises an engine air intake assembly and an engine exhaust assembly, the transmission comprises a transmission intake assembly and a transmission exhaust assembly;
• a first acoustical attenuation device defining a plurality of quarter wave tubes is positioned along a first assembly of the engine air intake assembly, the engine exhaust assembly, the transmission intake assembly, and the transmission exhaust assembly;
• and
• a second acoustical attenuation device defining a plurality of quarter wave tubes is positioned along a second assembly of the engine air intake assembly, the engine exhaust assembly, the transmission intake assembly, and the transmission exhaust assembly.

A vehicle, comprising:

• a frame;
• a plurality of ground engaging members including at least one front ground engaging member and at least one rear ground engaging member supporting the frame;
• an operator area supported by the frame;
• a powertrain drivingly coupled to at least one of the plurality of ground engaging members, the powertrain comprising an engine including an engine intake and an engine exhaust, a transmission including a transmission intake and a transmission exhaust, and a plurality of conduits;
• wherein a first conduit of the plurality of conduits defines a first plurality of quarter tubes and a second conduit of the plurality of conduits defines a second plurality of quarter tubes;
• and
• wherein each of the engine, transmission, the first plurality of quarter tubes, and the second plurality of quarter tubes are positioned rearwardly of the operator area.