Brand New Cummins 4BT Crankshaft Assembly – Cast or Forged Options
Restore your 4BT engine with confidence. This brand new Cummins 4BT crankshaft assembly is available in your choice of cast or forged steel — giving you the flexibility to match your rebuild to your performance needs and budget.
Whether you're building a dependable workhorse or a high-demand performance machine, we have the right crankshaft for you.
Available Options:
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Cast Crankshaft:
Ideal for standard-duty applications where cost-efficiency and reliability matter most. Manufactured to OEM standards for a smooth, balanced operation. -
Forged Crankshaft:
Built for high-load, high-RPM, and performance builds. Offers superior strength and fatigue resistance compared to cast crankshafts.
Features:
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Fits: Cummins 4BT engines
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Brand new: No remanufacturing, no core required
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Precision-balanced: Ensures optimal engine performance and smooth operation
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OEM quality: Built to exact Cummins specifications
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Ready to install: No hassle, no guesswork
Choose the crankshaft that fits your build — cast for reliability, forged for ultimate strength. Either way, you’re getting top-tier quality ready to deliver power and performance for the long haul.
Cross Reference:
| Manufacturer | OEM Number |
| CUMMINS | 3863276 |
| CUMMINS | 3908031 |
| CUMMINS | 3904477 |
| CUMMINS | 3916190 |
| Weight |
38.555 kg |
|---|---|
| Dimensions |
NOTE - CUT OFF TIME FOR SAME DAY SHIPPING IS 3PM CENTRAL TIME. ORDERS PLACED AFTER 3PM WILL SHIP OUT NEXT BUSINESS DAY. NEXTDAY SHIPMENTS THAT DO NOT ARRIVE ON TIME ARE NON-REFUNDABLE.
-FOR ORDERS INCLUDING HEAVY ITEMS(INFRAME KITS, HEADS,ETC.) PLEASE CHOOSE THE CORRECT SHIPPING AT CHECKOUT
NOTE - All open orders will have a 20% restocking fee. All returns will have a shipping fee.
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Forged Cummins 4BT Crankshaft Assembly | New | 3908031 | 3916190
