This Motorcraft serpentine belt is a high-quality replacement part for Ford F650 and F750 trucks. It has 8 ribs and fits perfectly with the OE/OEM part number 4C4Z8620CA. The belt is made in the United States and comes with interchange part numbers 8PK1912, 5080755, and 3579133C1. The belt is designed for use in a variety of Ford trucks and is not a universal fitment. This is a genuine Motorcraft part and not a performance or vintage part. Use this belt to ensure reliable and efficient operation of your vehicle.