Keep your 2003-2007 Ford 6.0L Powerstroke with single alternator or your 2003–2004 Dodge 5.9L Cummins with A/C running strong with the Dayco Poly Rib HD Serpentine Belt.

Built with a rugged EPDM rubber compound reinforced with aramid fibers, this belt delivers excellent durability, heat resistance, and long life. The poly-rib design ensures a secure grip and smooth performance across all your engine’s accessories while minimizing noise.

Designed to maintain proper tension and resist wear, it's a reliable, heavy duty replacement that’s ready to handle the demands of your diesel rig.