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(888) 312-8812 Login SignupThe Cummins V-Ribbed Belt gives strong drive alignment for accessory components on 4B3.9, 6B5.9, ISB, and ISB3.9, as well as ISL9 engines. This belt works across tensioners and pulleys to support alternators, water pumps, and fan systems with consistent rotation. Its design helps create a strong grip against pulleys while still allowing smooth travel at varying speeds. The Cummins 3289448 keeps belt engagement controlled, supporting the daily reliability regional fleets rely on.
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