Connecting rod illustration – not the actual part
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Connecting rod illustration – not the actual partDiesel Parts Direct logo

Aftermarket parts may appear slightly different, including the packaging.

Cummins4BT / 6BTConnecting Rods

DS-3971394 Connecting Rod For Cummins Engines

Compatible With 6C8.3, QSC8.3, 4B3.9, and 6B5.9 Engines

OEM #: 3971394SKU: DS3971394

Ships in 1-2 days

$167.48

Taxes and Shipping are calculated at checkout

Special Order Item - not eligible for return

This is a Connecting Rod for Cummins 6C8.3, QSC8.3, 4B3.9, 6B5.9, ISB6.7, and QSB5.9 engines.

SKU DS3971394
OEM Number 3971394
Part Type Connecting Rods
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.

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