RallySport Direct carries a wide selection of turbochargers for your Subaru WRX/STI. Most turbochargers are a direct fit, but please look up the confirmed applications tab located on our website to confirm fitment. Whether you’re looking for a mild upgrade from stock, or you want the right snail to compliment a full build, we have several options to choose from to help accommodate your goals. Horsepower levels are dependent on your tune, boost levels, as well as fuel modifications. So be sure to consult with an experienced tuner or engine builder to discuss your horsepower targets, and your driving style.
Here are a few examples of some of the great turbocharged options available at RallySport Direct.
Blouch Dominator 1.5XT-R 8cm^2 Turbo Subaru Models (inc. 2002-2007 WRX / 2004-2013 STI)
Investing in a larger turbo as well as supporting mods is one of the best power upgrades you could buy. Blouch is the leader in turbo development; they consistently build the best turbo's. The new XT-R line of turbos from Blouch consists of a billet compressor wheel to optimize the aerodynamics of a turbo and increase compressor flow within the same inducer geometry.
All of this combined with Garrett GT turbine and full ball bearing technology to produce a complete bolt-on package that includes stainless steel turbo oil feed line and steel oil drain tube and coolant lines. Adjustable upgrade actuator is standard issue on the 1.5XT-R and is pre-calibrated to operate at 15 PSI unless otherwise specified. The 1.5XT-R has a 56mm turbine to promote better spool up and a better overall turbo.
With the 8cm^2 housing this turbo will spool up slightly faster than the 10cm^2 version of the 1.5XT-R. With the faster spool comes a slight loss in the top end.
Tomei ARMS M8265 Turbo Subaru Models (inc. 2002-2007 WRX / 2004-2013 STI)
This turbo has the potential to deliver 450PS with the stock layout; from 4000RPM upwards is where peak power comes in. This Turbo's special characteristics will really show when added engine tuning and internal upgrades are done.
Includes: Turbo, Water Lines, Oil Return Lines. Gaskets, and Bolts.
Compressor Wheel: 52 Trim, 54.8mm Inlet Diameter, 76.2mm Exit Diameter
Turbine Wheel: 77.1 Trim, 67.0mm Inlet Diameter, 58.8mm Exit Diameter.
A silicone inlet hose is needed when using this turbo as the inlet is slightly larger than stock.
Blouch TD05H-18GXT-R Billet Ball Bearing Turbo 8cm^2 Subaru Models (inc. 2002-2007 WRX / 2004-2013 STI)
Investing in a larger turbo as well as supporting mods is one of the best power upgrades you could buy. Blouch is the leader in turbo development, they consistently build the best turbos. The new XT-R line of turbos from them consist of a billet compressor wheel to optimize the aerodynamics of a turbo and increase compressor flow within the same inducer geometry. Which allows you to build more horsepower at lower boost pressure.
It also consists of a 43 lb/min fully machined billet compressor wheel, a high efficiency Garrett GT turbine wheel, Garrett GT full ball bearing system, and a 8cm^2 bolt on turbine housing.
ATP Turbo GTX3576R Externally Gated Turbo Subaru Models (inc. 2002-2007 WRX / 2004-2013 STI)
Just like the GTX3576R kit 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 GTX3576R 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 GTX3576R 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 GTX3576R 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 GTX3576R 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.
For all other turbo inquiries, click here.