Turbocharger S300V for International 4300 4400 7300 7400 (2003-2013) 7.6L 9.3L

Direct-Replacement S300V Turbocharger for 2003-2013 International 4300, 4400, 7300, 7400 (NGV Platform)

What it Does: The S300V Turbocharger replaces the factory variable geometry turbo on 2003-2013 International 4300, 4400, 7300, and 7400 medium-duty trucks to restore manifold boost pressure, throttle transient response, and exhaust gas velocity control.

The Stock International DuraStar / WorkStar VGT Failure Points

Factory turbochargers on Navistar DT466, DT570, and MaxxForce DT engines are notorious for soot accumulation inside the variable nozzle mechanism. Excessive exhaust particulate and severe thermal cycling bind the unison ring and variable vanes, triggering persistent underboost (P0299) or overboost DTCs, heavy black exhaust smoke, and degraded torque under payload. Concurrently, journal bearing wear and heat-soak oil coking cause excessive shaft play, compressor wheel contact, and seal failure.

The Engineering Solution

This S300V129 unit is engineered to direct OEM BorgWarner 179035 specifications, incorporating a high-temperature alloy turbine housing to resist thermal distortion and fatigue cracking. The variable geometry vane assembly is precision-machined with tight clearances to minimize soot bind and ensure rapid nozzle indexing across the RPM band. Featuring a balanced CHRA, integrated compressor outlet elbow, and rigid mounting bracket, it is designed to ensure factory drop-in alignment with factory charge-air piping and oil feed galleries.

What's Included

• 1x S300V129 Variable Geometry Turbocharger
• 1x Compressor Outlet Elbow
• 1x Integrated Mounting Bracket

Technical Specifications

Compatibility

• 2003-2013 International 4300 (7.6L DT466 / MaxxForce DT)
• 2003-2013 International 4400 (7.6L DT466 / MaxxForce DT, 9.3L DT570)
• 2003-2013 International 7300 (7.6L DT466 / MaxxForce DT)
• 2003-2013 International 7400 (7.6L DT466 / MaxxForce DT, 9.3L DT570)

Frequently Asked Questions & Fitment Warnings

Does this fit the NGV Platform 4300, 4400, 7300, 7400?

Yes, this is a direct fit for the 2003-2013 International 4300, 4400, 7300, and 7400 equipped with the DT466, DT570, or MaxxForce DT engine. Always cross-reference your cast OEM turbo tag number before purchase.

Is an electronic actuator calibration required upon installation?

Yes, you must perform a VGT actuator position relearn using a diagnostic scan tool and pre-lube the center housing with clean oil prior to initial engine startup.

The International Commercial Fleet Standard

Constructed specifically for vocational severe-duty cycles, heavy towing, and severe hauling conditions where boost reliability and exhaust thermal management are mission critical.