GT2256MS Turbo 704136-0003 8972083520 Turbocharger for Isuzu 4HG1-T Engine

GT2256MS Turbo 704136-0003 8972083520 for Isuzu 4HG1-T Engine

Product Overview

High-durability GT2256MS Turbocharger for Isuzu NPR Trucks (4HG1-T Euro-1). IATF 16949 certified manufacturing. Replaces 704136-0003 & 8972083521. Factory direct price.

GT2256MS Turbocharger for Isuzu NPR 4HG1-T (4.6L) Engines

• Direct OEM Replacement: Specifically designed for a 1:1 "drop-in" fit for Isuzu NPR series trucks equipped with the 4HG1-T Euro-1 engine. Fully compatible with mechanical fuel injection systems and factory exhaust manifolds.
• Heavy-Duty Wastegate System: Features a robust internal wastegate that provides stable boost pressure, ensuring your 4.6L engine maintains consistent torque and power during heavy-load hauling and steep climbs.
• K18 Nickel-Alloy Turbine Wheel: Equipped with a premium K18 Nickel-Alloy turbine wheel, designed to withstand the high exhaust temperatures of older mechanical engines without blade deformation or fatigue.
• Precision VSR Balancing: 100% dynamic balancing tested at high speeds on a Vibration Sorting Rig (VSR) to ensure ultra-smooth operation, zero vibration, and maximum bearing longevity—essential for high-mileage commercial trucks.
• Reliable Oil-Cooled Bearing System: Features a proven journal bearing design optimized for the 4HG1-T’s oiling system, providing reliable lubrication even in high-dust and high-temperature environments.

Technical Specifications & Interchange Data

Applications

• Isuzu NPR Trucks: Lightweight and mid-weight commercial trucks utilizing the 4.6L 4HG1-T engine.
• Bus & Vocational Vehicles: Mid-size buses and specialized utility trucks on the NPR chassis.
• Logistics & Freight: High-uptime regional delivery and heavy-duty freight carriers.
• Engine Series: Isuzu 4HG1-T 4.6L 4-Cylinder Turbocharged Diesel.
• Garrett Numbers: 704136-5003S, 704136-0003, 704136-0001, 704136-0002, 704136-3, 704136-5001S, 704136-5002S
• Isuzu OEM Numbers: 8973267520, 8972083520, 8972083521, 8971784860, 8-9732-675-20, 8-9720-835-20 

FAQs

Q1: Is this turbocharger compatible with the naturally aspirated 4HG1 engine? 

No. This GT2256MS model is specifically designed for the turbocharged 4HG1-T version. If you are converting a naturally aspirated 4HG1 to turbo, you will need additional manifold and oil line components.

Q2: How do I verify fitment for my older Isuzu NPR? 

Please check the nameplate on your current turbocharger for the part number 704136-5003S or the Isuzu number 8973267520. These mechanical engines are very common in the 2000-2008 model years for international markets.

Q3: What causes early failure in 4HG1-T turbochargers? 

Since these are often high-mileage trucks, oil contamination and carbon buildup in the oil feed line are the primary causes. We strongly recommend replacing the Oil Feed Pipe and performing a fresh oil change during installation.

Q4: Do you offer a warranty for international fleet operators? 

We understand that Isuzu trucks are the workhorses of global logistics, which is why we stand behind our quality with full technical support.

Q5: Do you provide worldwide shipping? What is the delivery timeframe? 

We ship globally via premium carriers like DHL, FedEx, and UPS, as well as sea freight for bulk orders. In-stock items are typically dispatched within 24–48 hours. Express delivery to North America and Europe usually takes 5–7 business days.

About Us

Fengcheng Zhongke Turbocharger Co., Ltd. is a leading high-tech factory specializing in the R&D, production, and global distribution of high-performance turbochargers. Based in Fengcheng—one of the world’s most renowned turbocharger manufacturing hubs—we have grown from a local workshop into a global supplier, serving heavy-duty, commercial, and passenger vehicle markets worldwide.

At Zhongke, we don't just "make" parts.we engineer reliability.

• Material Integrity: We exclusively use K18 Nickel-Alloy turbine wheels, capable of withstanding extreme exhaust temperatures (up to 950°C) without deformation.
• Dynamic Balancing: 100% of our turbochargers undergo high-speed dynamic balancing tests at 150,000+ RPM to guarantee zero vibration and extended bearing life.
• Certified Quality: Our production processes are certified under ISO 9001 and IATF 16949, the gold standards for the global automotive and heavy-machinery industries.

Manufacturing Prowess:Our facility is equipped with state-of-the-art production lines, including precision 5-Axis CNC machining centers, high-speed VSR (Vibration Sorting Rig) balancing machines, and advanced material testing labs.

Our Specialization:We maintain a vast inventory of over 3,500+ turbocharger models, with a focus on heavy-duty and construction machinery engines, including Cummins, Caterpillar, Komatsu, Scania, Kobelco, and Hitachi. Beyond heavy-duty machinery, we also provide a comprehensive range of turbochargers for passenger vehicles and light commercial vans. Our catalog covers over 1,000 applications for leading automotive brands including Nissan, Audi, BMW, Mercedes-Benz, Toyota, Honda, and Hyundai. Focused on optimizing fuel efficiency and restoring factory horsepower, our passenger car turbos are engineered with the same precision and K18 heat-resistant materials as our industrial line, ensuring reliable performance for daily commuting and high-speed driving alike.

Global Partnership & Support: Zhongke Turbo is more than just a manufacturer; we are your long-term technical partner. With nearly 30 years of export experience, we understand the logistics and technical requirements of the international market. We provide a warranty and dedicated technical support to help our partners succeed.

• Key Export Regions: North America, Europe, the Middle East, Africa, Latin America, and Southeast Asia.

Experience the difference of nearly 30 years of factory expertise. Contact us today for wholesale inquiries or technical consultations.