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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 3905427 Flywheel Ring Gear

Compatible With 4B3.9, 6B5.9, B4.5, B5.9, B6.7, and ISB6.7 Engines (127 Teeth)

Genuine Cummins Part

Base price: $373.31
$328.51
i h
Not Returnable

PRODUCT NOTES

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

Also available in aftermarket.


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FLYWHEEL RING GEAR - 4B3.9 / 6B5.9 / B4.5 / B5.9 / B6.7 / ISB6.7 (127 TEETH)

$224.60