RHF5HB Turbo VG660060 14411AA321 Turbocharger for Subaru Impreza WRX STI With EJ20 Engine

RHF5HB Turbocharger VG660060 14411AA321 for Subaru Impreza WRX STI EJ20 Engine

Product Overview

Restore factory boost to your Subaru WRX STI. Exact-fit RHF5HB replacement turbocharger for EJ20 engines (OEM 14411-AA321). ISO/IATF certified factory direct.

High-Performance RHF5HB Turbocharger for Subaru Impreza WRX STI (EJ20 Engine)

• Direct OEM Replacement: Specifically engineered for a 1:1 "drop-in" fit for the Subaru Impreza WRX STI equipped with the 2.0L EJ20 engine, ensuring zero-modification installation and perfect ECU synchronization.
• Rapid Spool-Up & Performance: Optimized for the high-revving EJ20 platform to minimize turbo lag and deliver the aggressive boost response required for track, rally, and street performance.
• Superior Heat Resistance: Equipped with a premium K18 Nickel-Alloy Turbine Wheel, providing exceptional structural integrity and preventing blade deformation under the intense thermal loads of high-performance gasoline turbocharging.
• Precision VSR Balancing: 100% dynamic balancing tested at 150,000+ RPM on a Vibration Sorting Rig (VSR) to ensure ultra-smooth operation, zero vibration, and maximum bearing longevity—critical for high-RPM reliability.
• Factory Direct Quality: Manufactured to meet or exceed ISO 9001 and IATF 16949 standards by Zhongke Turbo, offering a high-reliability, cost-effective alternative to expensive dealership parts.

Technical Specifications & OEM Cross-Reference

Applications

• Subaru Impreza WRX STI: Models utilizing the 2.0L EJ20 turbo engine (typically JDM and specific export versions).
• Subaru EJ20 Series: High-performance EJ205, EJ207, and various 2.0L boxer turbo platforms.
• Performance Tuning: A popular replacement or mild upgrade for standard WRX models seeking STI-level reliability.
• Subaru OEM Numbers: 14411-AA321, 14411AA321
• IHI Numbers: VG660060, VA660060, VB660060, VC660060, VD660060, VE660060, VF660060
• Service Numbers: 5T-631, 5T631  

FAQs

Q1: How do I verify if this RHF5HB turbocharger fits my WRX STI? 

Please check the nameplate on your current turbocharger for the Subaru part number 14411AA321 or the IHI code VG660060. Since the STI has multiple regional engine variations, matching this specific 10-digit OEM number is the most reliable way to ensure a correct fit.

Q2: Is this a ball-bearing or journal-bearing turbocharger? 

The RHF5HB series is built to high-performance specifications. While many STI turbos (like the VF series) utilize ball-bearing technology for faster response, please verify your specific tuner requirements. Our unit is designed as a direct "drop-in" to match the original factory response and flow characteristics.

Q3: What are the installation requirements for an EJ20 engine? 

Subaru Boxer engines are very sensitive to oil quality. We highly recommend replacing the Oil Feed Line and cleaning/replacing the Oil Screen (banjo bolt filter) during installation. Always prime the turbo with fresh oil before the first start to protect the precision bearings.

Q4: What type of warranty do you provide for performance vehicles? 

We understand that STI owners demand the best, which is why we stand behind our quality with full technical support for enthusiasts and professional performance shops worldwide.

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, Deutz, Doosan, 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 Subaru, 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.