and the second outlet portion 420 may form one outlet portion 440 in an exemplary embodiment of the present invention the connection pipe 140 may be bent in a predetermined angle and the inlet portion 400 may be disposed in a vertical direction to the outlet portion 440 fig5 an exemplary schematic showing an inlet portion and an outlet portion of a connection pipe applied to an exhaust system according to an exemplary embodiment of the present invention referring to fig5 the inlet portion 400 of the first member 200 may be formed along a closed curve line of a circle shape in an exemplary embodiment of the present invention the inlet portion 400 may be formed along various types of closed curve lines and is not limited to the circle shape an exhaust gas passage may be formed at a central portion of the inlet portion 400 in addition the first outlet portion 410 of the first member 200 may be formed along a semi circle line and the second outlet portion 420 of the second member 210 may be formed along a semi circle line that is symmetrical to the first outlet portion 410 in an exemplary embodiment of.