The BEST option. For all roller cams, this set is the only way to go, since it comes with a pre installed TORRINGTON BEARING on the back of the cam gear. This 3 bolt 9 way adjustable billet timing chain set includes fully machined billet sprockets which are MADE IN THE USA, and a heavy duty chain that uses independent seamless (true) rollers. Detailed instructions for installation are included. One of the best sets on the market, at any price. Details of chainset appearance may vary slightly from the picture.