Abstract: An engine exhaust system is suspended from a power plant and a car body by a suspension apparatus so as to support an exhaust pipe, at a plurality of points, from a power plant system. A muffler is connected to the engine exhaust pipe and suspended, at a rear end of the muffler only, from the car body. The elastic suspension member includes an elastic block to be attached to the power plant or car body and a rigid bracket to hold the exhaust system.

Abstract: An engine exhaust apparatus in which an exhaust passageway of the engine is provided with a plurality of sound deadening passsages. One common exhaust passageway from the engine is branched into first and second exhaust passageways. Each of the first and second exhaust passageways has a silencer or muffler including first and second exhaust outlet tubes with a shift valve mounted in one of these exhaust outlet tubes. A control unit controls the shift valves to close both when engine speed is in a low region, to open one of them when engine speed is in a medium region and to open both when engine speed is in a high region.