Shown here is our high quality single bolt chain setup with AMERICAN MADE gears. The crank gear is heat treated steel, as well as being 3 way adjustable, allowing the camshaft to be installed "straight up" (0deg/factory,) retarded or advanced. The cam gear is made of class 30 grey iron. The chain uses heavy duty independent seamless "TRUE" rollers. Actual shape/appearance may differ slightly from the picture.