A-Premium Serpentine Belt 6-Rib 86.78 in — EPDM K-Section, Heavy-Duty Fit for V6/V8

The A-Premium Serpentine Belt 6-Rib 86.78 In is a replacement EPDM K-section drive belt designed to restore accessory drive performance and reduce noise and wear on compatible V6 and V8 engines.

This heavy-duty serpentine belt is engineered to match factory dimensions while leveraging modern EPDM rubber and polyester cord construction for improved durability. It fits a wide range of domestic and import vehicles — from light trucks to sedans — where an 86.78-inch effective length and a 6-rib K cross-section are specified. Before ordering, confirm fitment using your vehicle year, make, model, and engine to ensure proper compatibility.

Which vehicles will this 86.78-inch 6-rib belt fit?

The belt covers many late‑1990s through 2013 applications across several brands. It is intended for specific V6 and V8 engines in trucks, SUVs, vans, and some passenger cars. Always verify your vehicle's OEM part references or enter your vehicle details at checkout for a final match.

• Ram 1500 (2013) — V8 4.7L compatibility
• Chevrolet/GMC vans and trucks — many 4.3L V6 models (Astro, Express, Silverado, Sierra, Savana) 1999–2008
• Dodge/Chrysler — Durango, Nitro, Aspen with 3.7L or 4.7L engines and certain model years
• Additional fits: Jeep Liberty, Mazda B4000, Mercedes-Benz S320/SL320, Pontiac Grand Am, Ford Fusion, Mustang (select years)

How does the belt construction affect longevity and performance?

Material and internal cord design determine resistance to cracking, oil breakdown, and stretching. This belt uses EPDM rubber for improved environmental resistance and polyester cords for stable length retention under load, which helps keep accessory alignment consistent and minimizes slip.

• EPDM compound resists heat, ozone, oil, and road contaminants
• Polyester cords preserve tension and reduce elongation over time
• Precisely molded K‑section ribs maintain contact and reduce chatter

Is installation difficult and what should I check before fitting?

Installation is straightforward on most vehicles but requires access to the belt routing and tensioner. Inspect pulleys, idlers, and the tensioner for wear or damage before installing; replacing a worn tensioner or pulley at the same time prevents premature belt failure.

• Confirm belt routing diagram or take a photo before removal
• Inspect tensioner and idler bearings for smooth rotation and no play
• Use a proper tool to relieve spring tension; avoid forcing the belt over pulleys

What specifications and cross-reference numbers should I verify?

The belt’s effective length is 86.78 inches with an outside circumference near 87.345 inches and a top width of 0.807 inches. It carries multiple reference numbers used by OEM and aftermarket suppliers, so checking those against your vehicle’s part lookup helps confirm correct selection.

• Effective length: 86.78 in — Outside circumference: 87.345 in
• Rib count: 6 (K cross section) — Top width: 0.807 in
• Common reference numbers: K060868, 1L5E8620CA, 12557720 and others for cross-checking

Who is this for? A-Premium’s 6‑rib 86.78-inch serpentine belt is suited for DIY mechanics, professional technicians, and fleet managers replacing worn or noisy drive belts on compatible V6 and V8 engines. Choose this belt if you need a factory-dimension replacement made from durable EPDM with stable cord construction and you plan to inspect pulleys and the tensioner during installation for reliable, quiet operation.