Kinugawa Turbo Ball Bearing 3" TD06H-25G — Drop-In Upgrade for Nissan RB20DET & RB25DET
The Kinugawa TD06H-25G is a direct-fit ball bearing turbocharger engineered specifically for the Nissan RB20DET and RB25DET engines found in the R31, R32, R33, and R34 Skyline. Designed as a performance upgrade over the factory turbo, it delivers faster spool, higher flow capacity, and long-term reliability backed by a full 1-year warranty.
Vehicle Application
- Nissan RB20DET / RB25DET — R31, R32, R33, R34 Skyline
- Universal fitment: 2,000–3,500cc displacement
Note: Maximum power figures are based on compressor map choke flow (total turbo capability) and represent potential flywheel power. Actual results depend on vehicle modifications and tuning/calibration.
CHRA Specification
- Model: TD06H-25G
Compressor & Turbine Wheel Specs
- Compressor wheel: 61.5 / 78.0 mm
- Billet 6+6 blades — optimized for low-end torque and street drivability
- Billet 11+0 blades — optimized for top-end power and high-RPM flow
- Turbine wheel: 67.2 / 58.8 mm — 9-blade STS (Superior Turbine Strike) design for reduced lag and improved exhaust energy recovery. Learn more about STS technology ↗
Compressor Housing
- Nozzle area: AR.60
- Inlet: 76 mm / 3"
- Outlet: 51 mm / 2"
Turbine Housing
- Nozzle area: 8cm / AR.57 or 10cm / AR.73 (optional)
- Inlet: T3 flange
- Outlet: 6-bolt RB20DET / RB25DET type
- Wastegate: Internal gated
Bearing System
- STS Advanced — Dual Ceramic Ball Bearing
- Faster spool response vs. journal bearing turbos
- Reduced friction for improved efficiency and longevity
Cooling System
- Oil and water cooling (dual cooling)
Actuator Pressure
- Default: 1.0 bar / 14.7 PSI
- Available on request: 0.3, 0.5, 0.8, 1.2, 1.5, 1.7, or 2.0 bar — add a note at checkout or contact us
What's Included in the Box
- 1 × Turbocharger (TD06H-25G)
- 1 × Oil supply set
- 1 × Drain pipe kit
- 2 × Coolant supply lines
- 2 × Turbine gaskets (inlet + outlet)
- 6 × Starting kit components
- 1 × Balance report with Anti-Counterfeit Tag ↗
Install Kit
Condition & Balancing
- Brand new
- Full balance performed on Schenk MBRS110 (Germany) — industry-standard precision balancing equipment
Warranty
The Kinugawa Trouble-Free Warranty covers this turbocharger for 1 year from the purchase date for the original purchaser. If your turbocharger fails or develops an issue for any reason, Kinugawa Turbo Systems will provide a free overhaul, recondition, or replacement (subject to availability). Full coverage, no exceptions.
Frequently Asked Questions
Is the TD06H-25G a direct bolt-on for the RB25DET?
Yes. The TD06H-25G uses a T3 inlet flange and 6-bolt RB-type outlet, making it a direct-fit replacement for RB20DET and RB25DET applications in R31–R34 Skylines.
What is the difference between the 8cm and 10cm turbine housing?
The 8cm AR.57 housing spools faster and suits street and lower-boost builds. The 10cm AR.73 housing flows more at high RPM and is preferred for track or high-power applications.
What compressor wheel should I choose?
The Billet 6+6 blade wheel prioritizes low-end torque and is ideal for street driving. The Billet 11+0 blade wheel maximizes top-end airflow for high-power builds.
Who makes the TD06H-25G?
This turbocharger is manufactured by Kinugawa Turbo Systems, a specialist turbocharger brand known for OEM-quality ball bearing upgrades for Japanese performance engines including Nissan, Mitsubishi, and Subaru platforms.