Keep your 6.0L Powerstroke running at peak performance with the Gates FleetRunner HD Heavy-Duty Serpentine Belt, a premium replacement for Motorcraft/Ford part number 3C3Z-8620-DB. Designed specifically for 2003-2007 Ford Super Duty and Excursion models equipped with the 6.0L Powerstroke diesel and a single alternator, this heavy-duty Green Stripe belt is built to withstand the demanding conditions of towing, hauling, commercial use, and high underhood temperatures.
Unlike conventional serpentine belts, the Gates FleetRunner HD utilizes an advanced EPDM rubber compound and heavy-duty construction to provide superior resistance to heat, cracking, glazing, stretching, and wear. The result is quieter operation, improved belt stability, longer service life, and dependable accessory drive performance even under extreme loads.
Whether you're performing routine maintenance or replacing a worn factory belt, the FleetRunner HD is an excellent upgrade over a standard replacement belt while maintaining OEM fit and performance.
Features
- Direct replacement for Motorcraft/Ford 3C3Z-8620-DB
- Premium Gates FleetRunner HD (Green Stripe) construction
- Designed for severe-duty and commercial applications
- Advanced EPDM compound resists cracking, stretching, and heat degradation
- Excellent for towing, heavy hauling, fleet vehicles, and performance applications
- OEM fit with enhanced durability
- Quiet operation with consistent accessory drive performance
Fits
- 2003-2007 Ford F-250 Super Duty 6.0L Powerstroke Diesel
- 2003-2007 Ford F-350 Super Duty 6.0L Powerstroke Diesel
- 2003-2007 Ford F-450 Super Duty 6.0L Powerstroke Diesel
- 2003-2007 Ford F-550 Super Duty 6.0L Powerstroke Diesel
- 2003-2005 Ford Excursion 6.0L Powerstroke Diesel
Fits trucks equipped with a SINGLE alternator only.
Replaces OEM Part Numbers
- Ford 3C3Z-8620-DB
- Motorcraft JK8-1267-A
