This is a genuine OEM upper engine timing chain tensioner for Ford F-150 and Mustang models with 5.0L and 5.2L engines. It is made by Genuine Ford and comes with a 1-year manufacturer warranty. The tensioner is designed to fit upper and is not a performance part. It is interchangeable with part numbers BR3Z-6K254-B, ML3Z6K254ABB, BR3Z6K254B, BR3Z6K254B|ML3Z-6K254-A, and ML3Z6K254A. The product is made in the United States.