Re: Cycle World Article
The valve in the exhaust is called a cut out. You will notice that it is part of the front end of the muffler, you open it and by-pass the muff to gain a little performance or economy on the open road. Many early vehicles had them, even more were aftermarket. When I was young, on the edge of a really small almost ghost town near our farm was an old sign that read "Please Close Your Cut-Out".