An exhaust volume for combustion gases from a motor vehicle engine comprises at least one exhaust duct delimited by a wall comprising an end segment, and at least one flange having a bearing surface. The flange delimits at least one exhaust gas inlet communicating with the exhaust duct. The exhaust gas inlet is delimited by a cannon connected to the flange, with the cannon being attached to the end segment. At least one outer neck is attached to the end segment. The end segment is arranged between the flange and the outer neck, with the end segment being pierced with at least one hole between the flange and the outer neck. The end segment, the flange, and the outer neck are being secured through the addition of a filler.