Abstract: An exhaust valve includes a body defining a passage section and extending along an extension axis from an upstream inlet able to be connected to an upstream pipe to a downstream outlet able to be connected to a downstream pipe. A flap is positioned in the body, across the passage section, and rotates around a rotation axis secant to the extension axis between a closed orientation where the flap closes the passage section and an open orientation where the flap frees the passage section. A transmission member is aligned along the rotation axis and is secured to the flap by a first end, and the second end of which is positioned outside the body. A rotating actuator drives the flap via the second end of the transmission member. A fastening element is used to fasten the actuator on the outside of the body (2). The valve further includes at least one fin positioned between the body and the actuator. Also, an exhaust line includes such a valve.