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4.7 · 7 reviews
SKU: DL-425K6
Duralast

Duralast 42 1/2 in Serpentine Belt | 425K6

$9.19
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

  • Drive with confidence using superior power transmission performance delivered by this expertly crafted poly V belt.
  • Experience extended life and increased long-term reliability thanks to high tensile HMLS cord construction.
  • Benefit from quiet operation with reduced noise levels enabled by special modulus fibre-loaded rubber.
  • Count on dependable everyday operation with a standard replacement belt meticulously built to meet SAE standards.
  • Protect your purchase with the included 12-month warranty.

Details

Product Description

Keep your vehicle running smoothly with the Duralast 42.50 in Serpentine Belt 425K6, designed to deliver superior power transmission performance. This standard replacement serpentine belt features an effective length of 42.5 inches and is crafted from durable Ethylene Propylene Terpolymer (EPDM) material. Enjoy a reliable drive backed by a high tensile HMLS cord and special modulus fibre-loaded rubber that work together to reduce noise levels. Meticulously crafted to meet SAE standards, this belt provides unmatched strength, efficiency, and reliability for demanding applications while extending long-term reliability. Includes a 12-month warranty.

Technical data

Product Specifications

Part #
425K6
SKU #
165197
Rib Quantity
6
Grade Type
Standard Replacement
Material
Ethylene Propylene Terpolymer (EPDM)
Effective Length
42.5 in
Color
Black
Cross Section Designation
K
Type
Standard

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

4.7

Based on 7 reviews

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30
20
10
R
Riley N.Verified Buyer
06/08/2025

No complaints

Quick delivery and the product exceeded my expectations.

M
Maria K.Verified Buyer
08/17/2025

Would buy again

Does what it is supposed to do. Happy with this purchase.

T
Ted R.Verified Buyer
02/03/2025

Works perfectly

Setup was simple and it has worked reliably since day one.

P
Pat M.Verified Buyer
11/28/2025

Better than expected

Reliable product and smooth buying experience on this site.

C
Chris W.Verified Buyer
07/05/2025

Highly recommend

Good experience overall from checkout to delivery.

J
Jordan L.Verified Buyer
04/15/2025

Very happy with this

Packaging was secure and the item was in perfect condition.

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.