The Genuine Rocker Arms 3L3Z-6564-A are high-quality replacement parts designed specifically for Ford, Lincoln, and Mercury vehicles from the years 2004 to 2014. These direct-fit rocker arms come with a manufacturer warranty of 1 year and are genuine OEM parts, ensuring a perfect fit and reliable performance. With only part reference #13 on the diagram included, these rocker arms are a crucial component for maintaining the valvetrain system in your vehicle, making them a valuable investment for any car enthusiast or mechanic looking to ensure optimal engine function.