Timing Chain is in the front of the motor and attached to a set of gears and pulleys that power multiple mechanical components, including the crankshaft and camshaft. In order for a normal engine work,the timing chain must smoothly rotate around the gears. Timing chain is subject to wear and tear even break over time.Choose Hexautoparts timing chain kit to remedy the issue for a great timing chain price.Please make sure your model and year match before buying.