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This is an Engine Belt for 4B3.9, 6B5.9, ISB and ISB3.9 Cummins Engines. Specifically designed for heavy-duty truck, bus and off-road equipment applications. Absorbs normal shock loads without damage to belt.
This high quality replacement part is guaranteed to meet SAE J636b and SAE J637 specifications and is shipped with a 12-month warranty.
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