DS-3971746 Engine Belt For Cummins Engines

Compatible With 4B3.9, 6B5.9, ISB, and ISB3.9 Engines

OEM #: 3971746SKU: DS3971746

Ships in 1-2 days

Sale price$89.93

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Special Order Item - not eligible for return

This is an Engine Belt for 4B3.9, 6B5.9, ISB and ISB3.9 Cummins Engines. Micro-V belts provide peak operating performance while delivering the highest value on the market.

  • Designed for small diameter pulleys, backside idlers, and for use with (or without) automatic tensioners.
  • Meets or exceeds all specifications from the Original Equipment Manufacturer.
  • Flexible construction allows the belt to withstand billions of topside and backside bends in ABDS applications, resulting in long belt life.
  • Utilizes advanced materials like Aramid Fiber found in bullet-proof vests and crack and heat-resistant EPDM materials.

This high quality replacement part is guaranteed to meet SAE J1459, SAE J2432, and SAE J1596 specifications.

SKU DS3971746
OEM Number 3971746
Part Type Belts
OEM Brand CUMMINS

Aftermarket warranty

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  • Orders are processed the same or next business day
  • Expedited shipping options available at Checkout
  • If same-day shipping is critical, please call to confirm availability

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Call any of our friendly Parts Dept. Specialists with your engine serial number, and we can quickly verify whether this part is the correct part for your engine — no guesswork.

Phone: 888.687.0539

Don't know how to find your engine serial number? Go to our Engine Help Center for assistance.