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Our offices are closed for Thanksgiving. Orders placed online will be processed on Monday 12/1/2025.

Our offices are closed for Thanksgiving. Orders placed online will be processed on Monday 12/1/2025.

Cummins 3957921 Zinc Electrode Plug

Compatible With Ism, QSM, ISB, QSB, and ISB Engines

Genuine Cummins Part

Base price: $69.20
$62.28
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Not Returnable

PRODUCT NOTES

The Cummins 3957921 zinc electrode plug can be used for the following engines:

  • ISM and QSM
  • ISB and QSB
  • This item is a genuine Cummins part shipped with a 12-month factory warranty.

    Buy online or call us at 888.687.0539 if you have any questions about this item.
    As always, your satisfaction is guaranteed!


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