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Manifold 3943872 3943871 3942225 Replace for Cummins EngineQSB5.9 QSB6.7
$140.99
Sale price
$140.99
Regular price
Available to Order
This engine manifold is a dependable aftermarket replacement for compatible Cummins engines and helps restore proper air, exhaust, or fluid routing on the compatible engine.
Not sure which part fits your equipment?
Our Northline Parts team can help you find the right replacement. Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT | Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Product Overview
The manifold distributes or collects flow between engine components. Cracks, corrosion, damaged sealing surfaces, or internal restriction can cause leakage, poor performance, or operating problems.
Use 3943872, 3943871, and 3942225 when checking fitment, then verify the part number, engine model, port layout, bolt pattern, sensor ports, and gasket surfaces.
Key Features & Performance
- Restores the intended engine flow path
- Helps correct leakage caused by a damaged manifold
- Designed for compatible ports and mounting points
- Suitable for engine repair or rebuilding
Fitment & Compatibility
Compatible with select Cummins EngineQSB5.9 QSB6.7 applications. Serial-number breaks, production changes, or equipment options may affect the required part.
Technical Specifications
- Product Type: Engine Manifold
- Compatible Brand: Cummins
- Part Number(s): 3943872, 3943871, 3942225
Frequently Asked Questions
Q: How can I tell whether this is the correct manifold? A: Compare the original part number, port arrangement, bolt pattern, sensor or hose connections, and overall casting shape.
Q: Is this an original OEM part? A: No. It is an aftermarket component made to replace the listed part in compatible equipment.
Model listings are a guide only. Compare the original component and all available fitment details before purchase.