Also use with large HO alternator. 6-Rib, 142.0 inch/3607mm Belt Effective Length (Change these dimensions for each belt) The PPE High-Performance Heavy-Duty Serpentine Drive Belt provides reliability and durability to your vehicle, stock or modified, street or racing, domestic or imported. Each belt is precisely manufactured to the specified length for a seamless installation. The premium rubber material enables prolonged belt life and outstanding resistance to engine heat and cracking. The aramid fiber embedded in the belt prevents belt stretching even under high-load operations, while reducing belt noise and vibration at the same time. Verify the belt's effective length and V-rib profile before purchasing. Features Aramid reinforced undercord reduces noise, vibration and tension loss Heat resistant EPDM construction prevents cracking Low-stretch tensile cord Extends life of belt and belt-driven accessories Precision-ground belt profile ensures OEM fitment