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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 3978324 Idler Pulley For ISB And QSB Diesel Engines

Genuine Cummins Part

Base price: $270.25
$237.82
i h
Not Returnable

PRODUCT NOTES

The Cummins 3978324 idler pulley can be used on ISB and QSB applications.

This item is a genuine Cummins part shipped with a 12-month factory warranty.