Kinugawa Ball Bearing Turbocharger TD06SL2-20G — Drop-In Upgrade for Subaru WRX STI 2008–2020 (EJ25 / EJ207)
The Kinugawa TD06SL2-20G is a complete ball bearing turbocharger designed as a direct-fit upgrade for 2008–2020 Subaru Impreza WRX STI (GRB / GRF, EJ25 / EJ207). It replaces the OEM IHI RHF55 (VF39, VF43, VF48) and Mitsubishi TD04 / TD05H turbos with a larger, faster-spooling unit capable of supporting significantly higher power targets. Balanced on a Schenk MBRS 110 and backed by Kinugawa's 1-Year Trouble-Free Warranty.
What Vehicles Does the TD06SL2-20G Fit?
- 2008–2020 Subaru Impreza WRX STI (GRB / GRF) — EJ25 / EJ207
- 2008–2014 Subaru Impreza WRX STI Hatchback & Sedan
- 2010 Subaru Impreza WRX STI Special Edition Hatchback
- 2011–2014 Subaru Impreza WRX STI Limited Sedan & Hatchback
- 2015 Subaru Impreza (Base)
OEM Turbo Cross-Reference
- Replaces: IHI RHF55 VF39 / VF43 / VF48, RHF5HB
- Replaces: Mitsubishi TD04 49377-04502 (14412AA451), TD05H 49178-06310 (14412AA091 / AA092)
Compressor & Turbine Wheel Specifications
- Compressor Wheel: 52.3 / 68.0 mm — two billet options:
- Billet 6+6 blades — enhanced low-end torque, strong mid-range
- Billet 11+0 blades — optimized for top-end speed and high-RPM airflow
- Turbine Wheel: 54.1 / 61 mm — 9 Blades STS (Superior Turbine Strike) — improves boost response by 10–15%, reduces rotating mass for faster spool. Learn more about STS technology →
Compressor Housing
- Inlet: 2.25"
- Outlet: 2" (offset compressor outlet for clearance around the throttle-by-wire connector)
Turbine Housing Options
- 7cm / AR.49 — fastest spool, ideal for street and low-to-mid RPM builds
- 8cm / AR.57 — balanced street/track option, most popular choice
- 10cm / AR.73 — maximum top-end flow for high-power track builds
- Inlet & Outlet: Subaru single scroll
- Wastegate: Internal gated
- Material: High-Ni alloy for thermal resistance
Bearing Type — STS Advanced Dual Ceramic Ball Bearing
The Kinugawa STS Advanced dual ceramic ball bearing system improves boost response by 10–15% over journal bearing designs and delivers superior shaft dynamics control for longer service life.
Actuator Pressure
- Default: 1.0 bar / 14.7 psi
- Custom settings available: 0.3 / 0.5 / 0.8 / 1.2 / 1.5 / 1.7 / 2.0 bar
Cooling Type
- Oil and water cooling
What's Included in the Kit
- 1 × Turbocharger (TD06SL2-20G)
- 1 × Oil supply set
- 1 × Water supply and return pipe set
- 1 × Return oil pipeline
- 1 × Turbine inlet and outlet gasket
- 5 × Stud and nut set
- 1 × Balance Report with Anti-Counterfeit Tag — full dynamic balance certified on Schenk MBRS 110 (Germany)
Quality, Condition & Warranty
- Condition: Brand New
- Balancing: Full dynamic balance on Schenk MBRS 110 (Germany)
- Origin: Taiwan
Kinugawa Turbo Systems offers a 1-Year Trouble-Free Warranty from the purchase date to the original purchaser. If your turbocharger fails or has an issue for any reason, return it for a free overhaul, recondition, or replacement depending on availability.
Note: Maximum power figures are calculated based on the compressor map choke flow (total turbo capability) and represent potential flywheel power. Actual performance results depend on your vehicle's modifications and tuning/calibration.
Provider: Kinugawa Turbo Systems