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Turndowns are another insubstantial yet pricey item that can cost $50 each. Buck made them himself by slicing a 3 1/2-inch, 90-degree U-bend right in the middle of the radius, and welding it onto the mufflers. When welding aluminized steel, Buck suggests grinding the protective coating off of the areas of piping that will be joined together, which also removes grease and machine oil. View Related Article
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