Enhance your vehicle's performance and extend its lifespan with the Dayco 89657 Automatic Belt Tensioner. Specifically engineered for 2008-2010 F-Series trucks with the 6.4 Powerstroke engine, this tensioner is designed to deliver reliable and efficient operation. Its advanced features include a deflected arm plate that minimizes rotational movement for smoother belt operation, and a heavy-duty cast aluminum spring case that ensures durability. The zinc-coated mounting bolts resist rust, contributing to long-lasting performance. Meeting or exceeding OE specifications, the Dayco 89657 is a dependable choice for maintaining peak engine performance. Upgrade today and experience superior reliability and efficiency with the Dayco Automatic Belt Tensioner.

• Engineered for 2008-2010 F-Series with 6.4 Powerstroke engine
• Deflected arm plate reduces rotational movement for smooth operation
• Heavy-duty cast aluminum spring case for exceptional durability
• Meets or exceeds OE specifications for reliable performance