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V Ribbed Belt 4941258 for Cummins Engine QSB6.7 4B3.9 ISL L9N 6B5.9 ISB ISB3.9

V Ribbed Belt 4941258 for Cummins Engine QSB6.7 4B3.9 ISL L9N 6B5.9 ISB ISB3.9

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Product Details

V Ribbed Belt 4941258 for Cummins Engine QSB6.7 4B3.9 ISL L9N 6B5.9 ISB ISB3.9

Replacement Part Number: 4941258

Fit For Cummins Engine:
ISL G CM2180, L9N CM2380 L130B, QSB6.7 CM2850, QSB6.7 CM850, 4B3.9, 6B5.9, ISB, ISB3.9

Product Highlights
Brand: FridayParts
Compatible Engine Brand: For CUMMINS
Engine Number: 4B3.9, 6B5.9, ISB, ISB3.9, ISL G CM2180, QSB6.7 CM850, L9N CM2380 L130B, QSB6.7 CM2850
Replacement Part Number: 4941258
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Top Reviews

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Mark T.
Reviewed on 08/01/2026
Reliable Performance

This V-ribbed belt was exactly what I needed for my service truck's engine. The quality is immediately noticeable—it's robust and well-made. Installation was straightforward with a perfect fit on the pulleys, no issues with tension or alignment. Since the replacement, the belt has been running quietly and smoothly with zero slip, even under heavy load. The broad compatibility listed was accurate for my application. It's a high-quality component that delivers reliable performance. Highly recommend for a hassle-free replacement.

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