Keep your 2008–2010 Ford 6.4L Powerstroke running strong with the Dayco Automatic Serpentine Belt Tensioner for the main drive belt is engineered for durability, quiet performance, and lasting reliability.

Dayco’s patented flat spring design minimizes tension fluctuations, reducing the risk of premature accessory bearing failure from over-tension and eliminating belt noise, slippage, or poor performance from a lack of tension. Inside the spring, a PTFE string helps dampen vibration and resists abrasion for quieter operation. Constructed with a rugged cast aluminum case and arm, this tensioner resists fatigue and cracking even under tough conditions. Features like a steel pivot tube, thermoplastic rubber spring slot plugs, rubber O-ring seals, and zinc-coated mounting bolts all help resist wear and corrosion.

Built to outperform OE specs, this tensioner is an ideal replacement for maintaining your truck's performance and reliability.