How do I confirm pilotpart234751 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

Exhaust Manifold 3937478 for Cummins 4B3.9 QSB5.9 CM850 Engine

For Cummins Manifold

Intake and Exhaust Manifold 3937478 for Cummins

Q: What part numbers are associated with this Manifold?

3937478, 4B3.9, QSB5.9, CM850, QSF2.8, CM2880, F114, QSB6.7, CM2250, ISF3.8, CM2220, F103

OEM / REF: 3937478SKU: pilotpart234751

Cummins Intake and Exhaust Manifold 3937478 is listed under Engine Spare Parts > Intake and Exhaust Manifold with catalog data including Part Number: 3937478. Verify fitment for Cummins Engine Spare Parts using the OEM number, mounting points, and photos of your existing part.

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

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$315.99USD/EA

~~$75,280.00~~Save 100%

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Oct 21 – Oct 28
10	Oct 19 – Oct 26
50	Oct 17 – Oct 24

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.

Manifold Description

This Manifold is indexed for Part Number. Compare reference number 3937478 against the label on your existing Cummins component before ordering.

Additional cross references on file: 4B3.9, QSB5.9, CM850. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

39374784B3.9QSB5.9 CM850 QSF2.8 CM2880F114QSB6.7 CM2250 ISF3.8 CM2220F103

Applications

Part Number

Specifications

Part Number	3937478

Fitment Notes

Brand or application signal: Cummins Engine Spare Parts
Product family: Manifold
System category: Engine Spare Parts > Emission & Exhaust System > Manifold
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.