This automotive product failed to perform as expected, causing significant issues with my car. While it initially seemed like a cost-effective solution, the 38113 Professional Automatic Tensioner proved to be ANYTHING but. The lone pro is that it is easy to install. The cons, however, far outweigh any perceived benefits. The product is not durable, breaks down easily, and fails to maintain the proper tension needed to keep a car running in top condition .Don't waste your time or money on this inferior product..