A-Premium Serpentine Belt 6-Rib 54.71 in — EPDM K-Section, Heavy-Duty Fit for Ford F-150 & Transit

The A-Premium 6-rib serpentine belt (54.71 in effective length) is a direct-replacement EPDM drive belt designed to restore accessory drive performance for many Ford, Transit, truck and light commercial engines.

This heavy-duty serpentine belt is built with an EPDM compound and polyester cords to resist heat, ozone and wear while maintaining smooth, quiet operation. It’s a K-section belt with six ribs and a 54.71‑inch effective length (55.31‑inch outside circumference), made to match factory routing and pulley spacing on a wide range of light trucks, vans, sedans and medium-duty commercial vehicles. Before ordering, confirm fitment using your vehicle year, make and model.

Which vehicles will this 6-rib belt fit?

This belt covers many common applications across Ford F-150s, Mustang, Transit vans, and several commercial and heavy-duty models. Fitment spans multiple engine sizes from 1.6L four-cylinders to larger V6 and inline-six diesel engines; verify your exact year and engine to ensure compatibility.

• Covers Ford F-150 (2011–2023) V6 3.3L/3.5L/3.7L and Mustang V6 3.7L (2012–2017).
• Fits Transit 150/250/350 models (2015–2023) with 3.5L and 3.7L engines.
• Also lists compatibility with select Freightliner, International, GMC, Lincoln, Mini Cooper and other commercial platforms.
• Always input vehicle details on the product page to confirm match before purchase.

How durable and quiet is the A-Premium serpentine belt?

Constructed from EPDM elastomer with polyester cord reinforcement, the belt is engineered for resistance to heat, cracking and ozone deterioration. The multi-rib K-section profile provides stable contact with pulleys, helping reduce slippage and noise under typical driving conditions.

• EPDM material for improved heat and ozone resistance.
• Polyester cords to maintain tensile strength and reduce stretch.
• 6-rib K-section profile for smoother pulley engagement and quieter running.
• Outside circumference: 55.31 inches for consistent routing and tensioning.

What should I check before installing this belt?

Inspect the belt tensioner and pulleys before fitting a new belt—worn tensioners or misaligned pulleys shorten belt life and can cause squeal or premature failure. Confirm the reference numbers and effective length match your vehicle’s original equipment to ensure a correct, trouble-free installation.

• Verify effective length (54.71 in) and cross-section designation (K) against OEM specs.
• Examine tensioner and idler pulleys for smooth rotation and no play.
• Replace worn tensioners, bearings, or misaligned pulleys prior to belt installation.
• Reference numbers included with the part for cross-checking compatibility.

What warranty and support come with this replacement belt?

A-Premium backs the serpentine belt with a one-year, unlimited-mileage warranty and provides customer guidance on fitment and installation. The product is intended as a reliable aftermarket alternative; pair it with recommended accessories or replacement pulleys when performing maintenance.

• 1-year unlimited-mileage limited warranty for peace of mind.
• Manufacturer recommendations include tensioner inspection before use.
• Designed for straightforward, direct-replacement installation in compatible vehicles.

Who this is for: mechanics, DIYers and fleet managers who need a dependable, OEM-style serpentine drive belt for a broad array of Ford light trucks, Transit vans, select commercial tractors and passenger cars. If you require an EPDM, 6-rib K-section belt with a 54.71‑inch effective length and robust reinforcement, this A-Premium belt is aimed at restoring accessory drive reliability and quiet operation when fitted to the correctly matched vehicle.