Valve for motor vehicle exhaust muffler

An exhaust valve, in particular for a motor vehicle, comprising:

• a support comprising an exhaust gas passage opening;
• a plug able to move by tilting between a plugging position and a release position of the exhaust gas passage opening;
• an elastic strip for returning the plug to the plugging position, the elastic strip comprising a first end fastened to the support and a second end bearing on the plug, the second end being able to slide on the plug between a first position, in which the plug is in the plugging position, and a second position, in which the plug is in the release position;
• and
• wherein the plug includes a stop forming a hard spot that cooperates with the second end of the elastic strip when said elastic strip is in the first position, the stop forming an obstacle for the movement of the second end of the elastic strip from the first position to the second position.