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4.3 · 3 reviews
SKU: DL-408K6S
Duralast

Duralast 40 51/64 in Serpentine Belt 408K6S

$14.49
Delivery by Oct 18
  • Free shipping over $25
  • Next-business-day ship
  • Easy returns
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Shipping Information

Free shipping on orders over $25. Most items ship next business day after your order is placed.

Returns Policy

Returns are accepted when the product is in its original, unopened container. Contact us if you have questions about your order.

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Product facts

About This Item

  • Experience superior power transmission performance with meticulously crafted Poly V Belts designed for demanding applications.
  • Enjoy a quieter ride through reduced noise levels provided by special modulus fibre-loaded rubber.
  • Count on long-lasting reliability and extended life thanks to high tensile HMLS cord construction.
  • Get dependable operation built to meet strict SAE standards for efficiency and strength.
  • Maintain your vehicle with confidence using a standard replacement serpentine belt featuring a 40.8-inch effective length and 6-rib design.

Details

Product Description

Get superior power transmission performance with the Duralast 40.80 in Serpentine Belt 408K6S. This standard replacement serpentine belt delivers unmatched strength, efficiency, and reliability to keep you moving forward. Crafted to meet SAE standards, it features high tensile HMLS cord and special modulus fibre-loaded rubber that work together to provide superior power transmission performance while reducing noise levels. Enjoy extended life that increases long-term reliability for demanding applications. Each purchase includes a 12-month warranty to give you peace of mind with your maintenance.

Technical data

Product Specifications

Part #
408K6S
SKU #
1145777
Rib Quantity
6
Grade Type
Standard Replacement
Material
Ethylene Propylene Terpolymer (EPDM)
Effective Length
1035 mm
Instruction Manual Included
No
Color
Black
Cross Section Designation
K
Type
Standard
Belt Material
Synthetic Rubber (SBR)

Brand

Brand Story

Alternator, battery, and brake rotor arranged on dark concrete

Replacement parts

Duralast

Parts

Duralast

Batteries, brakes, and belts in the Duralast line

Duralast is a replacement-parts brand covering batteries, brake parts, belts, and rotating electrical. District Mailing Auto carries selected Duralast items from that lineup.

Shop Duralast

  • Lineup

    Under-car and under-hood

    The brand covers batteries, brake parts, belts, and rotating electrical.

  • Application

    Belts and brakes

    Typical jobs include serpentine belts and disc-brake service.

  • Storefront

    At District Mailing Auto

    Shop the Duralast products currently in the catalog.

Customer Reviews

4.3

Based on 3 reviews

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E
Emma S.Verified Buyer
12/14/2025

Exactly what I needed

Easy to order and arrived quickly. Product matched the listing and works great.

D
Dana H.Verified Buyer
10/02/2025

Solid purchase

Quality feels premium and it fits my needs well.

A
Alex P.Verified Buyer
01/09/2025

Fast shipping too

Impressed with the quality for the price. Will be back for more.