Tomei Subaru Impreza WRX (94-20) & WRX STI (94-07) EJ20 & EJ25 Single Scroll MX7960 Journal Bearing Turbocharger with Billet Actuator

The Tomei TB401A-SB01B turbocharger is engineered to enhance the performance of the Subaru EJ20 and EJ25 engines. Building on the proven design of the M-Series, this unit incorporates advanced features such as a lightweight billet compressor wheel and a multi-rate billet actuator for precise boost control.

Key Features
Multi-Rate Billet Actuator: This actuator features a robust forged billet construction, allowing for fine-tuning of boost pressure. It includes six springs for customizable settings, enabling up to three springs to be combined for optimal performance. The swivel-type nipple facilitates flexible hose routing.

Billet Compressor Wheel: Constructed from aerospace-grade materials, the new billet compressor wheel provides significant airflow improvements. With thinner blades and a larger surface area, it enhances turbo spool characteristics compared to traditional cast wheels.

Specifications
Model: Subaru EJ25 Single Scroll, Subaru EJ20 Single Scroll
Compressor Wheel:
Inducer Diameter: 52 mm
Exducer Diameter: 68 mm
Trim: 6
Material: A261, CNC Billet
Turbine Wheel:
Inducer Diameter: 6 mm
Exducer Diameter: 5 mm
Trim: 7
Material: K41, Cast
Compressor Housing:
Inducer Diameter: 53 mm
Exducer Diameter: 41.63 mm
Turbine Housing:
Inducer Diameter: 45 mm
A/R: 0.57
Initial Boost Setting: 1.0 kgf/cm

Fitment
Subaru WRX EJ20 (1994-2020)
Subaru WRX STI EJ20 (1994-2007)
Subaru WRX EJ25 (2006-2014)
Subaru WRX STI EJ25 (2006-2007)