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4309221 HE300FG Turbocharger Replacement for Cummins QSB
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3774139 3774140 3788522This 4309221 HE300FG turbocharger serves as an aftermarket replacement for Cummins QSB truck engines meeting Tier 3 standards. Designed as a direct substitute for OEM reference numbers 3774139, 3774140, and 3788522, this unit supports fleet maintenance and repair operations. Buyers should verify specific engine configurations and mounting details before ordering to ensure correct application.
Key Specifications
This HE300FG turbocharger assembly is identified by part number 4309221. It serves as a replacement unit for Cummins QSB engines, specifically those meeting Tier 3 emission standards. The product references OEM numbers 3774139, 3774140, and 3788522 for verification purposes. Each unit is packed in a 26x30x33 cm carton with a gross weight of 16 kg. Buyers should confirm the turbo model and reference numbers match their existing hardware before ordering.
Application & Compatibility
This HE300FG turbocharger is listed for Cummins QSB truck engines meeting Tier 3 standards. It serves as a replacement application for units identified by OEM reference numbers 3774139, 3774140, and 3788522. Buyers must verify the specific engine model, vehicle application, and turbo configuration before ordering. Confirm that the part number 4309221 matches your existing hardware to ensure correct fitment and avoid installation issues.
Technical Notes
This HE300FG turbocharger assembly is designed for Cummins QSB truck engines meeting Tier 3 standards. The unit features standard flange connections and mounting details typical for this series. Buyers should inspect the compressor and turbine housing orientation to match their specific engine layout. Verify oil inlet and outlet port positions against the original unit before installation. Ensure all gaskets and seals are replaced during the swap to maintain proper sealing and prevent leaks.
B2B Supply
LeadTurbo supports B2B buyers with volume pricing for the 4309221 HE300FG turbocharger. Worldwide shipping is available for this 16 kg unit, packed in a 26x30x33 cm carton. Our team provides technical fitment support to help verify OEM reference numbers 3774139, 3774140, and 3788522 against your Cummins QSB engine. Contact us to confirm application details and secure competitive rates for fleet or workshop orders.
Product FAQ
CUMMINS and other product, brand and model names are the property of their respective owners and are used for reference and application-lookup only. LeadTurbo is not affiliated with or endorsed by CUMMINS.
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Frequently Asked Questions
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Complete Turbo Units
Complete turbo units designed for rigorous heavy-duty use where OEM units may fall short.
CHRA / Core Assemblies
Brand-new compatible CHRA cores — like-new performance at a fraction of replacement cost.
Turbine Wheels & Shafts
Precision-balanced turbine shafts engineered from inside out for superior durability.
Turbine Housings
Silicon-molybdenum (Si-Mo) nodular cast iron — engineered for extreme heat resistance.
Compressor Housings
OEM-matched geometry and surface finish — advanced casting and machining for perfect fitment.
Bearing Housings
Rock-solid platform engineered for high-output rebuilds — the foundation for performance.
Compressor Wheels
Aluminum, stainless steel, or titanium alloys — precision machined for superior responsiveness.
