Abstract: A horizontally installed muffler may include a housing, first and second tail pipes installed to front and rear ends of the housing through the housing, an introduction chamber formed inside the housing and to which an outlet of the exhaust pipe is connected, a first intermediate pipe fluid-connected to the introduction chamber and having a first discharge hole, a discharge chamber fluid-connected to the introduction chamber through the first discharge hole of the first intermediate pipe, wherein each end of the first and second tail pipes and the first discharge hole are disposed inside the discharge chamber, first and second resonance chambers formed inside the housing, a second intermediate pipe fluid-connected to the first and second resonance chambers through the discharge chamber and the introduction chamber and having an introduction hole disposed inside the introduction chamber and a second discharge hole disposed inside the discharge chamber.

Abstract: A horizontally installed muffler may include a housing, first and second tail pipes installed to front and rear ends of the housing through the housing, an introduction chamber formed inside the housing and to which an outlet of the exhaust pipe is connected, a first intermediate pipe fluid-connected to the introduction chamber and having a first discharge hole, a discharge chamber fluid-connected to the introduction chamber through the first discharge hole of the first intermediate pipe, wherein each end of the first and second tail pipes and the first discharge hole are disposed inside the discharge chamber, first and second resonance chambers formed inside the housing, a second intermediate pipe fluid-connected to the first and second resonance chambers through the discharge chamber and the introduction chamber and having an introduction hole disposed inside the introduction chamber and a second discharge hole disposed inside the discharge chamber.