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Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

Cummins 3957921 Zinc Electrode Plug

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

Genuine Cummins Part

Base price: $72.00
$63.36
i h
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.


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