Tomei TB403A-SB01D Turbocharger

The Tomei TB403A-SB01D is engineered for those looking to enhance their turbocharged Subaru performance. This turbocharger is specifically designed for the Subaru EJ25 and EJ20 Single Scroll engines, offering a blend of durability and efficiency that meets the demands of both street and track applications.

Multi Range Billet Actuator

This turbo features a robust multi-rate billet actuator constructed from forged billet material. It includes six springs, allowing for precise boost adjustments. You can combine up to three springs to tailor the boost pressure to your specific needs. The swivel-type nipple design facilitates easier hose routing, ensuring a cleaner installation.

Billet Compressor Wheel

The TB403A-SB01D incorporates a newly designed billet compressor wheel that significantly outperforms traditional cast designs. Crafted from aerospace-grade materials, this lightweight compressor wheel features thinner blades and a larger surface area, resulting in improved airflow and quicker turbo spool times.

Specifications

• Model: Subaru EJ25 Single Scroll, Subaru EJ20 Single Scroll
• Target Horsepower: 40 HP
• Bearing Type: Ball Bearing
• Initial Boost Setting: 1 Kgf/cm²
• Compressor Wheel:
  • Inducer Diameter: 52 mm
  • Exducer Diameter: 68 mm
  • Trim: 6
  • Blades: 6
  • Material: A261
  • Production Method: CNC Billet
• Turbine Wheel:
  • Inducer Diameter: 61 mm
  • Exducer Diameter: 54 mm
  • Trim: 7
  • Material: K41
  • Production Method: Cast
• Compressor Housing:
  • Inducer Diameter: 53.4 mm
  • Exducer Diameter: 44 mm
  • A/R: 0.78
• Turbine Housing:
  • Inducer Diameter: 45 mm
  • Exducer Diameter: E
  • A/R: 0.57

Installation Instructions

• For detailed installation instructions, CLICK HERE.

Fitment

• Subaru WRX EJ20 Single Scroll (1994-2007)
• Subaru WRX STI EJ20 Single Scroll (2001-2007)
• Subaru WRX EJ25 Single Scroll (2002-2007)
• Subaru WRX STI EJ25 Single Scroll (2001-2007)