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  See all Turbo | Supercharger products
Tomei MX7960 EJ Single Scroll Arm Turbo Kit - TB401A-SB01B
Tomei MX7960 EJ Single Scroll Arm Turbo Kit - TB401A-SB01B - Image 6 Tomei MX7960 EJ Single Scroll Arm Turbo Kit - TB401A-SB01B - Image 2 Tomei MX7960 EJ Single Scroll Arm Turbo Kit - TB401A-SB01B - Image 3 Tomei MX7960 EJ Single Scroll Arm Turbo Kit - TB401A-SB01B - Image 4 Tomei MX7960 EJ Single Scroll Arm Turbo Kit - TB401A-SB01B - Image 5 Tomei MX7960 EJ Single Scroll Arm Turbo Kit - TB401A-SB01B - Image 6

Tomei ARMS Mx-Series Turbocharger - Part Number: TB401A-SB01B

Elevate your driving experience with the Tomei ARMS Mx-Series Turbocharger, specifically designed for Subaru enthusiasts who demand performance without compromise. The TB401A-SB01B model is a testament to Tomei's commitment to innovation, showcasing a lightweight billet wheel and a multi-rate billet actuator that enhances both power and efficiency.

Key Features:

  • Multi-Range Billet Actuator: This turbocharger comes equipped with a robust multi-rate billet actuator, featuring six springs for precise boost adjustments. Combine up to three springs to tailor your setup for optimal performance, while the swivel type nipple provides flexibility in hose routing.
  • Billet Compressor Wheel: The newly engineered billet compressor wheel is crafted from aerospace-grade materials, ensuring durability and improved airflow. Its thinner blades and larger surface area contribute to quicker spool times and enhanced overall performance.

Specifications:

  • Model Compatibility: Subaru WRX EJ20 (1994-2020), Subaru WRX STI EJ20 (1994-2007), Subaru WRX EJ25 (2006-2014), Subaru WRX STI EJ25 (2006-2007)
  • Compressor Wheel:
    • (A) IND (mm): 52
    • (B) ExD (mm): 68
    • Trim: 6
    • Material: A261
    • Production: CNC Billet
  • Turbine Wheel:
    • (C) ExD (mm): 5
    • (D) IND (mm): 6
    • Trim: 7
    • Material: K41
    • Production: Cast
  • Compressor Housing:
    • IND (mm): 53
    • ExD (mm): 41.63
  • Turbine Housing:
    • IND: 45
    • ExD: E
    • A/R: 0.57
  • Initial Boost Setting: 1.0 kgf/cm²

Installation Instructions:

For detailed installation instructions, CLICK HERE.

Customer Feedback:

"I installed the Tomei TB401A-SB01B on my WRX, and the difference is night and day! The throttle response is crisp, and I love how quickly it spools up. Highly recommend!" - Mike, Subaru Enthusiast

"This turbocharger has transformed my driving experience. The build quality is impressive, and the tuning options are a game changer!" - Sarah, Performance Driver

Note:

All images are representational only; actual products may vary slightly.

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Who is Tomei?

Tomei is one of the most recognizable brands when it comes to performance tuning. The company started in 1968 by Mr. Seiichi Suzuki and initially tuned race cars. Their concept is “To produce a great product for ultimate driving pleasure” which has translated into all their parts, making it a sought-after brand worldwide. Today, Tomei is used by various enthusiasts, tuners, professional drivers, and racers everywhere.

Racing Heritage

Tomei has its roots firmly attached to motorsports racing. With its experience in creating fast cars for decades, it was able to create parts that are considered as one of the most.sophisticated and technologically advanced parts in the market. Not only does it produce power. It ensures that it maintains its reliability as well.

The company offers a wide range of products, ranging from engine components such as camshafts, valve springs, pistons, connecting rods, cam gears, gaskets, limited slip differentials, exhaust systems, and more. Their parts are designed to perform well, not only on the streets, but on the track as well.

They have various race track records under their belt to prove it.

Purchase Tomei Products at Vivid Racing

If you want to upgrade the performance of your vehicle, then Tomei is the right brand for you. The company has consistently provided its customers with high-perfromance products that deliver what it promised. Using only the highest quality of materials available, which includes Titanium, they are able to develop parts that are strong and lightweight. This is the formula for a better performing engine. Visit Vivid Racing and check out their list of products that would fit your specific requirement.

















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Things
Sale price None
Wholesale price $1,305.08
Shipping Weight: 21.00
Length: 12
Width: 15
Height: 15
Product Added At Tuesday 03 April, 2018
Product Modified At Monday 23 June, 2025
Imported By ETLOverride
Last Edited By kathI@vividracing.com
View In Admin

Emissions Info
Carb Approved No
Carb Number -
Epa Status -
Prop65 Yes
Carb Required -
Vendors
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Vendor Inv Cost Retail Jobber MAP Core Updated
Premier WD Inventory Type: NonStocking
$1,305.08 $1,580.00 $1,580.00 $1,422.00 ? 2025-07-09 19:57:58
Tomei Powered USA Inc $1,106.00 $1,659.00 ? ? ? 2025-06-23 11:45:36
Tomei Powered USA Inc 3 ? $1,580.00 ? ? ? 2025-07-09 16:36:12


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