Gates K081377 Serpentine Belt

Gates K081377 Premium OE Micro-V Belt

The Gates K081377 is a Premium OE Micro-V serpentine belt built for accessory drive systems that demand OE-style size, construction, and material matching. It is a fitment-based replacement for select Ford Super Duty applications, including 1999-2003 Ford F-250 Super Duty and 1999-2003 Ford F-350 Super Duty with ambulance prep package and dual alternators.

Key Features

• Premium OE Micro-V belt from Gates
• Part number: K081377
• 8-rib automotive V-ribbed belt design
• EPDM belt material for durable accessory drive performance
• Polyester cord construction
• OE performance rating for factory-style fit and function
• Top width: 1.087 in. (28 mm)
• Effective length: 137.72 in. (3498 mm)
• Outside circumference: 138.29 in. (3513 mm)

Product Details

Gates Micro-V belts are engineered to match OE dimensions, construction, and materials so the belt tracks correctly across the accessory drive system. The K081377 uses an 8-rib K-section profile and EPDM compound to support consistent belt operation in demanding engine bay conditions. This part number is a direct replacement choice for Ford F-250 Super Duty and Ford F-350 Super Duty trucks in the listed configurations, and it is also referenced by cross-number applications such as Dayco 5081373.

For buyers searching for a 1999-2003 Ford F-250 Super Duty serpentine belt, 1999-2003 Ford F-350 Super Duty accessory drive belt, or Gates K081377 OE Micro-V belt, this part provides a precise OE-style service option. It also cross-references Dayco 5081373 for the same application.

What It Helps Address

• Squealing or chirping from a worn serpentine belt
• Cracking, glazing, or rib wear on the belt surface
• Loss of proper accessory drive engagement
• Uneven belt tracking on OE-style pulley systems
• Replacement needs on Ford Super Duty trucks with dual alternators

Installation Notes and Tips

Verify belt routing against the vehicle’s accessory drive diagram before installation. Confirm the application matches 1999-2003 Ford F-250 Super Duty or 1999-2003 Ford F-350 Super Duty with ambulance prep package and dual alternators. Inspect pulleys, tensioner condition, and alignment before fitting the new belt to help prevent premature wear. The K081377 is a serpentine belt for the accessory drive system, so correct routing and tension are important for proper operation.

Quality Assurance

Gates positions the Premium OE Micro-V belt line as an OE-style replacement program that follows factory size, construction, and material standards. The K081377 is built to OE performance expectations for the listed Ford Super Duty applications.