Custom make your own muffler extension. Will fit most engines .29 to .80 and most mufflers. This stock can be cut, drilled, tapped, and welded. Comes 1 per package. Dimensions: OUTSIDE INSIDE Width: 1.75" Width: 1 3/16" Length: 6.0" Height: 5/16" Height: 7/16" Top and Bottom thickness: 1/16" Thickness at sides: 9/32" Does NOT include mounting hardware!