The BETTER option: A very very nice AMERICAN MADE 3 bolt billet steel double roller set. Both the 3 bolt cam and 3 way adjustable crank gears are first fully machined out of 1141 billet steel. After machining, they are run through a vibratory tumbler to remove all sharp edges. When the sharp edges of other competitors chains are viewed through a jeweler's loupe (try this yourself..), they are full of scraps and hanging burrs, many of which will end up in the oil pump and/or bearings after a few hours of operation. After the tumbler, the gears are hand filed, and then the crank gear is heat treated to a Rockwell hardness of 50 on the C scale (nearly twice the hardness of other competing chain sets,) and then run through the tumbler AGAIN, fully removing all the burrs and scraps mentioned above. This set includes a Rolon chain that uses heavy duty independent seamless rollers. The crank gear is also 3 way adjustable, allowing the camshaft to be installed "straight up" (0deg/factory,) retarded or advanced. No other manufacturer takes the time and effort to put their products through as many painstaking (and expensive) manufacturing processes as these chainsets go through. Shop around and you will find that there is not a timing set anywhere that comes close to this quality for anywhere near this price. For an amazing AMERICAN MADE value, this set takes the cake!