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Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
Community Media
User Media for: Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
User Media for: Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
User Media for: Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
User Media for: Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)
User Media for: Tomei ARMS M7960 Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)

Tomei ARMS M7960 Turbo

Subaru Models (inc. 2002-2007 WRX / 2004+ STI)

Features & Product Details

RallySport Direct is proud to provide you with more quality turbocharger options brought to you by Tomei. 

On this page, you are looking at the Tomei ARMS M7960 Turbocharger. This turbocharger retains the low-speed power range, with that extra punch at mid to high-speed range. Additionally, this turbo has balanced transient characteristics to produce peak power to suit those who want the best of both worlds. 

Here are the key features:

 

  • Machined from aerospace grade materials
  • Thinner blades with a larger surface area for improved airflow and turbo spool
  • Multi-Rate Billet Actuator
  • Large capacity
  • Swivel-type nipple allows more room for routing hoses
  • Supports up to 400 HP
  • Max boost is achieved at 4000 RPM
  • Additional info:

  • Journal bearing
  • Compressor wheel inducer: 52.6mm
  • Compressor wheel exducer: 68mm
  • Compressor wheel trim: 60
  • Compressor wheel blades: 6
  • Compressor housing inducer: 61.85mm
  • Compressor housing exducer: 50.0mm
  • Turbine wheel exducer: 54.0mm
  • Turbine wheel inducer: 61.0mm
  • Turbine wheel trim: 78
  • Turbine wheel blades: 11
  • Turbine housing A/R: 0.77mm
  • Includes water lines
  • Includes oil return lines
  • Includes gaskets
  • Includes hardware
  • Product Video

    Specifications

    Brand: Tomei
    Bearing Type: Journal Bearing
    Cartridge: Tomei
    Fitment: OEM Upgrade
    Gaskets Included: Yes
    Inlet Size: OEM
    Oil Line Included: No
    Ported Turbine Housing: No
    Rated Horsepower: 400hp
    Scroll: Single
    Wastegate: Internal
    Mfgr. Warranty: 1 Year
    Condition: New Product
    Return Policy:

    RallySport Guarantee - 30 Days


    Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

    RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

    The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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    REVIEWS & CUSTOMER MEDIA

    6 Reviews
    4.3 out of 5 Stars
    5 Stars
    (4)
    4 Stars
    (1)
    3 Stars
    (0)
    2 Stars
    (1)
    1 Stars
    (0)
    Customer Photos and Videos
    Tomei ARMS M7960 Turbo ( Part Number: 173023)
    Tomei ARMS M7960 Turbo ( Part Number: 173023)
    Tomei ARMS M7960 Turbo ( Part Number: 173023)
    Tomei ARMS M7960 Turbo ( Part Number: 173023)
    Tomei ARMS M7960 Turbo ( Part Number: 173023)
    3 of 3 people found the following review helpful
    Japanese  4 years ago
    5out of 5stars

    This Turbo is a work of art, every thing is included and install is actually quite enjoyable. good instructions and good hardware. the only frustrating part is fitting the 90 degree bend onto the bottom of the intercooler. as far as performance goes it all comes down to how you are tuning it. my car is a 2006 JDM STI forester and it has the EJ255 i am using a Link G4+ ecu. the boost threshold is about 300rpm later than the standard turbo boost comes on smooth and hard and flows plenty of air all the way to the redline, definitely a pleasure to drive. Tomei have really got the power range perfect for these engines.
      
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    1 of 1 people found the following review helpful
    EXCELLENT Stock-location turbo! 6 years ago
    5out of 5stars

    Tomei quality is second to none! For bigger a stock-location turbo the 7960 packs a punch across the board all the way to redline! No lag! I also have a medley supporting mods- EL headers/up-pipe, full exhaust, TGV's, fuel pump, fuel kit, 1000cc injectors, EBCS, air/oil separator, bigger TMIC, pro-tune….HIGHLY recommend it if you cannot really afford a rotated kit.
      
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    1 of 1 people found the following review helpful
    Tomei Arms M7960 Turbo 7 years ago
    5out of 5stars

    Been running this turbo for over a year now, 2007 WRX Limited, this turbo is very high quality and pulls hard from the mid range on up. My torque number is slightly lower than whp numbers, but I am fine with that. Other than that, this is a fantastic all around powerful turbo.
      
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    Updated review - Really not digging this turbo. 7 years ago
    4out of 5stars

    I made a few changes to my configuration and this turbo is doing much better. Changes: - head gaskets, from 1.2mm to .78mm, now around 8.5:1 CR - TMIC, Process West - Turbo back exhaust (this shouldn't make much difference After another full tune I made 332WHP/337WTQ on a different dyno from my origional tune. However, I did get a baseling first before the retune on the new dyno, which ended up at 278WHP/265WTQ, so for the most part, I gained 54WHP/72WTQ and mostly due to the compression change. The bad, I still don't get full torque until 4500RPM, which is somewhat of a letdown considering an nice TD06/20G should be doing the same thing 700RPMs sooner with a larger compressor wheel than this turbo. It's a BLAST above 4500 RPMs, but that's not the power range I bought this turbo for. I give this review a 4 to offset the 2 I gave before to even out at a 3.
      
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    M7960 8 years ago
    5out of 5stars

    Ce Tomei is a regal for my configuration in E85. When to Rallysportdirect, I am satisfied 100 %.
      
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    QUESTIONS & ANSWERS

    • Q: Can this turbo just be slapped on in exchange with stock  Mattymatt908 2 years ago

      I was wondering what is needed to upgrade to this turbo? What is a necessity ?
      • 0 of 0 people found the following answer helpful

        A:  On an otherwise stock vehicle, you would want to have an upgraded downpipe, fuel pump, fuel injectors, and a professional tune at a minimum when installing this turbo. A catback, upgraded intercooler, intake, and various other bolt ons would help the turbo to reach it's full potential.

        Marcus E. @ RallySport Direct 2 years ago  
          
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    • Q: Tomei 7960 in gc8  Connor2 years ago

      Previously mentioned was that to put it into a gc8 it would require an external wastegate. What are the conflicts with the internal wastegate and the gc8?
    • Q: hotside  sammyajohnston810962 years ago

      would this turbos hotside be comparable to an 8cm?
    • Q: Compressor map and peak effeciency  554P3 years ago

      Have Tomei released a compressor map for this turbo? What is this turbo designed to run as max boost or at what boost range is it most effecient? Would the STI 565cc injectors be enough for this turbo on a 2.0L?
    • Q: Tomei ARMS M7960 fitted to Mitsubishi Evo VI 2.3 Stroker Engine  ruthyb533 years ago

      My newly fitted M7960 turbo has failed due to oil starvation - . Do you supply a larger diameter high flow oil feed pipe for this application?
      • 0 of 0 people found the following answer helpful

        A:  Sorry but we do not have any additional hardware for this turbo that will allow more oil flow.

        Chris W. @ RallySport Direct 3 years ago  
          
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