IHI VF48 RHF55 Turbocharger Assembly - Subaru OEM Part Number 14411AA700 - Fit WRX STI EJ257 Engine
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| Turbo Model | IHI VF48 (RHF55 series) |
| Manufacturer Part Number | 14411AA700 / 14411-AA700 |
| Manufacturer Frame Size | RHF55 (Journal Bearing Sliding Bearing) |
| Compressor Blade Specification | Induction Diameter 48mm / Outer Diameter 68mm (Cast Aluminum 6+6 blades or 9 blades bimetallic optional) |
| Turbo Blade Specification | Induction Diameter 55mm / Outer Diameter 48mm (Inconel 713C High-Nickel Alloy 11 Blades) |
| Turbo Shell A/R Value | Turbo side P18 Single Scroll / Compressor side standard A/R |
| Exhaust Bypass Valve Type | Built-in (IWG) Actuator, Standard Open Pressure Approximately 0.55-0.65 bar (8-9.5 psi) |
| Cooling Type | Water-cooled + Oil-cooled Double-Circuit Intercooler Shell |
| Intake Flange | Compressor outlet 2.5 inch V-band or 3 bolt flange (depending on specific year model) |
| Exhaust Flange | Turbo Inlet 5 Bolt Subaru Standard Triangular Flange (P18) |
| Bearing System | Full Floating Sliding Bearing (Journal Bearing) + Thrust Bearing |
| Maximum Working Speed | Approximately 160,000 - 180,000 RPM |
| Compatible Engine Displacement | 2.5L (EJ257/EJ255) |
| Certification | ISO 9001 / IATF 16949 OEM Production Line |
Manufacturer No.
RHF55VF48VB440057VA440028VB440028VC440028VD440028VE440028
OEM Part No.
14411AA70014411-AA70014411AA57214411-AA57214411AA37114411AA62014411AA6209L
Engine Part No.
EJ257EJ25Subaru 2.5L H4 TurboEJ255
Interchange No.
6672562N841F56CAVF41411-05302-002VF41VF39VF52VF43VF30VF35VF37VF49F52CAD-S0057B9F0021GRBK-ZIH11-0100
Fitment Vehicles
Subaru Impreza WRX STI (GR/GV Chassis 2008-2014)Subaru Impreza WRX STI (VA Chassis 2015-2021 Some configurations need to be verified)Subaru Forester XT (SH Chassis 2009-2013)Subaru Legacy GT (2005-2009 VF39/VF43/VF48 Interchangeable)Subaru Impreza WRX (2006-2007 VF39/VF43)
Exhaust and Intake System - Industrial Encyclopedia
Original IHI VF48 (RHF55 frame) turbocharger, part number 14411AA700, designed specifically for the 2008-2014 Subaru WRX STI (GR/GV chassis) and EJ257 2.5L horizontally opposed turbocharged engine. Provides multiple interchange numbers such as 667256, 2N841, F56CA for cross-verification, direct fit without adjustment, supports single-scroll exhaust gas bypass valve (IWG) structure, water/oil cooling dual cycle bearing system, meets OEM durability and performance standards.