Horizontally installed muffler having sporty tone

A horizontally installed muffler having a sporty tone, which receives exhaust gas emitted from an engine through an exhaust pipe at a side surface of a housing formed in a widthwise direction of a vehicle and emits the exhaust gas to the outside through a pair of tail pipes connected to front and rear ends of the housing formed in the widthwise direction of the vehicle,

• wherein the side surface of the housing is formed to face a front of the vehicle and connected to the exhaust pipe,
• the exhaust pipe is connected to an introduction chamber disposed inside the housing and has an outlet extended and connected to the inside of the introduction chamber,
• a discharge chamber is disposed to fluid-communicate with the introduction chamber,
• the pair of tail pipes to discharge the exhaust gas to the outside of the housing has inlets positioned inside the discharge chamber,
• when the engine is operated at a speed lower than a predetermined value, the exhaust gas introduced to the introduction chamber is emitted to the discharge chamber through a first intermediate pipe having an inlet disposed adjacent to the outlet of the exhaust pipe and then discharged to the outside through the tail pipes, and
• when the engine is operated at a speed higher than the predetermined value, the exhaust gas introduced to the introduction chamber is emitted to the discharge chamber through a second intermediate pipe having introduction holes formed more remotely from the outlet of the exhaust pipe than the first intermediate pipe, and then discharged to the outside through the tail pipes.