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ATP Turbo GTX3582R Externally Gated Turbo ( Part Number:ATT ATP-SUB-027)

ATP Turbo GTX3582R Externally Gated Turbo - Subaru Models (inc. 2002-2007 WRX / 2004+ STI)

Manufacturer Part # ATP-SUB-027


MSRP: $2,295.00

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Just like the GTX3076R kit ATP-SUB-021 but with built in flange for Tial 44mm wastegate on the turbine housing. High flow, less exhaust backpressure, more precise boost control, even more power! Tial 44mm wastegate and dump tube sold separately.

The Garrett GTX Ball Bearing GTX35R (aka GTX3582R aka GTX35/40R), the ultimate 600+ HP capable dual ball bearing turbo, is now available in a drop-in package for the Subaru WRX/STI! The easy to implement turbo assembly that takes no more than 1-2 hours to install in place of the stock journal bearing VFXX unit is made possible by a high flowing GTX inspired ATP exhaust housing and a series of custom engineered components built to suit the installation.

Each GTX drop-in turbo package consists of a Garrett factory assembled and high speed balanced dual ball bearing CHRA which is then assembled into a set of CNC machine ported housings that have been optimized in every aspect for maximum flow and efficiency.

All accompanying oil and coolant supply components included in each kit have been designed to properly and seamlessly bridge the Garrett GTX turbo to the EJ engine so that the fit is as OE as possible.

Just bolt the turbo on, add fueling and a good tune and prepare for a blast of acceleration. Garrett GTX turbos offer more than just "peak HP" numbers. These GTX turbos off more torque area under the curve and more "accessible" power than any other turbos series out there.

We do recommend that you compliment your GTX bolt-on turbo with a nice high flowing bellmouth downpipe and a high flowing inlet pipe to effortless channel air in and out of the turbo. Although every bolt-on GTX turbo ships with a 3" inlet, we do provide a "stepdown" sleeve just in case you're forced to use the stock 2.25" inlet hose. However, as a rule of thumb, turbos, especially higher flowing units love as much inlet flow as possible. This promotes both quicker spoolup and better ultimate HP, with less boost pressure at the manifold. The 3" downpipe and bigger inlet is critical for reaching peak efficiency on the GTX turbo. Please also be aware that some downpipes such as the stock catted downpipe, has a "no-flow" door at the wastegate flapper area. This type of downpipe may not allow the wider swinging wastegate valve to open all the way, thus causing the possibility of a "boost-creep" condition or uncontrollable rise in boost.

The GTX3582R is a great power maker on the 2.5L that still has great spoolup, especially if you're looking for best area under the curve possible, but still need a lot of power in the high revs. The GTX3582R makes boost about 200 to 300 rpms later than the GTX3076R but keeps pumping where the GTX3076R starts to run out after 500HP. A lot of the boost is still available at part to medium throttle. Dual ball bearings means some boost is always there even if you are lugging the engine and boost recovery between gearshifts is awesome with full boost ready even before upshift is complete as the STI lurches forward with shear enthusiasm at the onset of each gear. The 2.0L driver should not rule out the use of the GTX3582R if his HP target is in the same range. This competition grade turbo is still a big favorite for the HP range because it hits like a hammer while other 600HP turbos are still "spooling up".

What sets the GTX apart from the GT series turbo is the new high flowing 11 blade next generation compressor wheel.

2 uppipe gaskets will be needed if using the included spacer.
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Brand: ATP Turbo
Bearing Type: Ball Bearing
Cartridge: Garrett
Fitment: OEM Upgrade
Gaskets Included: No
Inlet Size: 3.0in
Oil Line Included: Yes
Rated Horsepower: 600+hp
Scroll: Single
Wastegate: External

Mfgr. Warranty: 12 Months
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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Verified Purchase

Not for stock motor
FJG24 4 years ago
So I bought this turbo not thinking so clearly. Kind of got stuck up in the do scripting which makes it sound awesome. Which don't get me wrong it could be awesome. I'm not gonna list every mod I have on my 11 sti. But I would recommend having a built block before going this route. Huge difference between stock and this. Lags all the way till 4300, but does hit like a rocket once spooled. Very hard to get used to. If you auto x I would not recommend this. More for the people that want to go straight fast. I'm very interested in seeing what this turbo has once my block is built
Verified Purchase

exactly what i was looking for 6 years ago
this turbo really hits hard. it spools later than stock obviously but makes the big power where it counts, awesome product.

  • Q: Gtx3582r turbo   Blaiserman 1 year ago


    Will this turbo fit on a 2006 legacy gt?

    • A: This turbo will fit your 06 Legacy GT.

      Jared A. 1 year ago
  • Q: gtx3582r  technoinferno 2 years ago


    i own a 2011 sti and im planning on doing a big build with the gtx3582r.. id like to take the gtx35 and match it with the spearco tmic , methanol injection 50/50 or 75/25 , 1200cc injectors big fuel pump, fully built short blockwith heads,speed density tuned,cosworth manifolds, ill be running on 94oct (canada) at what rpm should the gtx spool using a tmic and how much power should i make with all these mods ?!

    • A: This turbo will be able to support well over 600+ HP.

      Jared A. 2 years ago
  • Q: Turbo   2011sti 2 years ago


    Will this work with a ets fmic And i would need a wastegate witch one will go with this turbo what do you guys recommend The wastegate and dump tube and the other pipe with it

    • A: This should fit with the ETS Front Mount. I recommend a 44mm wastegate and the 44mm Grimmspeed External Wastegate Uppipe.

      Josh P. 2 years ago
  • Q: Compressor / turbine specs  Jbrar 3 years ago


    What are the size specs for the wheel & housing for both sides? (Inducer/exducer/ a/r)

    • A: Compressor Wheel: Ind: 62.5mm Exd:82.5mm Turbine Wheel: 68.00mm Turbine A/R for Subaru Stock Location: .72 a/r Compressor A/R for Subaru Stock Location: .60 a/r

      Zach G. 3 years ago
  • Q: Power  Christianyount17764 3 years ago


    Is it possible to make 550+whp with supporting mods on this turbo on a 2013 sti?

    • A: With the proper tune, supporting modifications and fuel type that should be possible.

      Brady R. 3 years ago