RHF55V Turbo CHRA VBA40026 290KT-20110 Turbocharger Cartridge for Isuzu 4HK1 Engine

RHF55V Turbo CHRA VBA40026 290KT-20110 for Isuzu 4HK1 Engine

Product Overview

Restore Isuzu 4HK1 engine boost with our RHF55V Turbo CHRA. Fits NPR/NQR/NRR trucks. VSR balanced, IATF 16949 certified. Replaces 8981479061 & VAA40026. Factory direct.

High-Precision RHF55V Turbocharger CHRA for Isuzu 4HK1 (5.2L) Engines

• Restore Fleet Performance: A premium-grade replacement cartridge (CHRA) designed to restore the original boost pressure and fuel efficiency of your Isuzu N-Series trucks. Perfect for resolving oil leakage and shaft play in high-mileage 4HK1 engines.
• VGS/VGT Compatibility: Specifically calibrated to synchronize with the RHF55V Variable Geometry System (VGS). The turbine wheel and shaft dimensions are precision-matched to ensure smooth movement of the variable nozzle vanes.
• K18 Nickel-Alloy Turbine Wheel: Features a high-nickel K18 alloy turbine wheel, built to withstand the continuous high thermal loads of urban delivery cycles (Euro 4/5/6) without blade fatigue or deformation.
• Precision VSR Balancing: 100% dynamic balancing tested on a Vibration Sorting Rig (VSR) at speeds exceeding 150,000 RPM. Technical Benefit: This ensures whisper-quiet operation and prevents premature bearing failure, keeping your trucks on the road longer.
• Professional Grade Assembly: Manufactured to meet IATF 16949 quality standards. Fully assembled and ready for a "drop-in" installation into your existing housings.

Technical Specifications & OEM Cross-Reference

Applications

• Isuzu N-Series: NPR, NQR, NRR, NPS commercial trucks.
• GMC / Chevrolet: W3500, W4500, W5500 Forward series utilizing the Isuzu 4HK1 5.2L engine.
• Logistics & Distribution: High-uptime freight carriers, refrigerated trucks, and last-mile delivery vans.
• Engine Series: Isuzu 4HK1-T, 4HK1-TC, 4HK1-XY 5.2L Turbocharged Diesel.
• IHI / F5B / F58 Codes: VAA40026, VBA40026, VCA40026, VDA40026, VABAF550030, F58VED-S0026B, F58VED-S0026G, F58VED-S0026GN, F5BVEDS0030B, F5BVED-S0030G
• Isuzu OEM Numbers: 8980725930, 8981479061, 8981479062, 8981479063, 8982490470, 8983476140, 8983476141, 8983476142, 8983476143, 8983755350, 8983755351, 8983755352, 8938476141, 98147906, 98249047, 98347614, 98375535, 97780736, 97780738
• Interchange Numbers: 290KT-20110, 290KT20110, 290KT-20120, 290KT20120, 290KT20010  

FAQs

Q1: How do I verify if this CHRA fits my RHF55V turbo? 

Please check the nameplate on your turbo's compressor housing. If you see part number 8981479061 or the IHI code VAA40026, this CHRA is a 100% guaranteed fit.

Q2: Is the RHF55V CHRA compatible with my electronic actuator? 

Yes. This CHRA is designed to work with the factory-installed electronic VGS actuator. However, please ensure your nozzle ring mechanism (inside the turbine housing) moves freely before installing the new CHRA. A stuck nozzle ring is a common cause of actuator failure.

Q3: What maintenance is critical for Isuzu 4HK1 VGS turbos? 

The 4HK1 engine is sensitive to oil quality. We strongly recommend using low-ash synthetic oil and replacing the Oil Feed Line during installation to prevent carbon deposits from clogging the precision VGS components.

Q4: Do you offer bulk pricing for commercial truck fleets? 

Yes. We specialize in supporting logistics fleets and professional diesel workshops. Please contact us for wholesale pricing on bulk orders of Isuzu 4HK1 series turbochargers and cartridges.

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.