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Tomei ARMS M7960 Turbo

Part #: TOM 173023
MSRP: This Item is no longer available.



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.


Retains the low speed power range, with that extra punch at mid to high speed range. This is turbo has the balanced transient characteristics to produce peak power to suit those who want the best of both worlds.

Includes: Turbo, Water Lines, Oil Return Lines. Gaskets, and Bolts.

Compressor Wheel: 60 Trim, 52.6mm Inlet Diameter, 68.0mm Exit Diameter
Turbine Wheel: 78.4 Trim, 61.0mm Inlet Diameter, 54mm Exit Diameter.


Verified Purchase

2 years ago
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.

Specter 9 months ago
I see you're running a top mount intercooler, could you give me an estimate on how much power it put down. I'm sticking with a top mount intercooler but can't decide wether to get this turbo or the arms m7760.
Verified Purchase

EXCELLENT Stock-location turbo!
Mike H. 4 years ago
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.
Specter 9 months ago
Can you give an estimated on how much power it put down, I'm thinking of sticking with a TMIC.
Verified Purchase

Tomei Arms M7960 Turbo
guest55c52785caae52f5098b6bb7 5 years ago
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.
Verified Purchase

Updated review - Really not digging this turbo.
Purist 6 years ago
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.
Verified Purchase

t.yohann45531 6 years ago
Ce Tomei is a regal for my configuration in E85. When to Rallysportdirect, I am satisfied 100 %.

  • Q: Can this turbo just be slapped on in exchange with stock  Mattymatt908 3 months ago


    I was wondering what is needed to upgrade to this turbo? What is a necessity ?

    • 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. 26 days ago
  • Q: Tomei 7960 in gc8  Connor 4 months 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?

    • A: The GC8 is a JDM vehicle and we cannot confirm fitment for it.

      Luis L. 2 months ago
  • Q: hotside  sammyajohnston81096 5 months ago


    would this turbos hotside be comparable to an 8cm?

    • A: This turbo hotside actually uses a 61mm turbine wheel so it would be closer to a 6cm.

      Riley D. 4 months ago
  • Q: Compressor map and peak effeciency  554P 1 year 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?

    • A: The compressor map can be found below along with information about the turbo. The OEM STI injectors are not going to flow enough fuel for this turbo.

      Jared A. 1 year ago
  • Q: Tomei ARMS M7960 fitted to Mitsubishi Evo VI 2.3 Stroker Engine  ruthyb53 2 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?

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

      Chris W. 2 years ago