How do I confirm pilotpart102514 fits my machine?

Compare the OEM or reference part number, machine model, engine model, and serial number. You can also submit a fitment inquiry before ordering.

In Stock

Bare Cylinder Block 3903920 4991816 for Cummins 4BT 4B Engine

For Cummins Cylinder Block

Cylinder Block 3903920 for Cummins

OEM / REF: 3903920SKU: pilotpart102514

Bare Cylinder Block 3903920 4991816 for Cummins 4BT 4B Engine is a Cylinder Block replacement part indexed for Part Number and Cummins 4BT 4B Engine, OEM quality.. Match OEM part number 3903920 and confirm fitment for Cummins Engine Spare Parts before ordering.

Stock: In stock
Condition: New
Fitment: Cummins Engine Spare Parts
Category: Cylinder Block

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$3,265.91USD/EA

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Nov 8 – Nov 15
10	Nov 6 – Nov 13
50	Nov 4 – Nov 11

Estimates from today; confirm exact lead time before payment.

Quantity

Buy online now or add to your quote list for bulk pricing and fitment confirmation.

Confirm fitment before ordering →

Lead times can vary by freight route and customs. Contact support for expedited shipping.

Cylinder Block Description

This Cylinder Block is indexed for Part Number; Cummins 4BT 4B Engine, OEM quality.. Compare reference number 3903920 against the label on your existing Cummins component before ordering.

Additional cross references on file: 4991816. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

3903920 4991816

Applications

Part Number
Cummins 4BT 4B Engine, OEM quality.

Specifications

Part Number	3903920, 4991816

Fitment Notes

Brand or application signal: Cummins Engine Spare Parts
Product family: Cylinder Block
System category: Engine Spare Parts > Cylinder Components > Cylinder Block
Recommended verification: OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability: InStock
Shipping: Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns: Returns are easier when fitment is confirmed before ordering.
B2B support: Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.