Enhance your 2008-2010 6.4 Powerstroke F-Series with the Dayco 89629 Automatic Belt Tensioner – Air Conditioning. Engineered to meet or exceed OEM specifications, this premium tensioner integrates advanced technology for superior performance and durability. It features a deflected arm plate for precise control of rotational movement, ensuring smooth and reliable operation. Constructed with a rust-resistant cast aluminum case and zinc-coated mounting bolts, it offers exceptional strength and corrosion resistance. Additionally, the built-in locator pin secures the tensioner during installation, guaranteeing accurate placement. Rigorously tested against industry standards, the Dayco 89629 provides long-lasting, dependable service for your vehicle