ATP GT3071R EWG Turbo - WRX 2002-2007 / STI 2004-2007
Just like the GT3071R kit (ATP-SUB-001), but with a built-in flange for a Turbosmart 44mm wastegate on the turbine housing. High flow, less exhaust back-pressure, more precise boost control, and even more power!
|This product is universal or does not fit your vehicle. Please verify fitment before purchase!|
The Garrett GT Ball Bearing GT3071R, quite possibly the fastest spooling and most responsive 450+HP capable turbo on the planet, is now available in a drop-in package for the Subaru WRX/STI! The turbo assembly takes no more than 1-2 hours to install in place of the stock journal bearing VF turbo is made possible by a high-flowing GT-inspired ATP exhaust housing and a series of custom-engineered components built to suit the installation.
Each GT 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 GT turbo to the EJ engine so that the fit is as close to OEM as possible.
Just bolt the turbo on, add fueling and a good tune, and prepare for a blast of acceleration. Garrett GT turbos offer more than just peak HP numbers. These GT turbos offer much more torque area under the power curve and more accessible power than any other turbo series out there.
We do recommend that you complement your GT bolt-on turbo with a nice high-flowing bellmouth downpipe and a high-flowing inlet pipe to effortlessly channel air in and out of the turbo. Although every bolt-on GT 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, turbos, especially higher-flowing units, love as much inlet flow as possible. This promotes both quicker spoolup and better HP, with less boost pressure at the manifold. The 3" downpipe and bigger inlet is critical for reaching peak efficiency on the GT turbo. Please also be aware that some downpipes, such as the stock catted downpipe, have 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 an uncontrollable rise in boost.
The GT3071R is a great match on the 2.5L, especially if you're looking for a boost threshold that is close to stock but want enough airflow for 450+HP. Almost all of the boost is available all the time, even at low to medium throttle. Boost recovery between gearshifts is awesome, with full boost ready even before the upshift is complete as the car lurches forward with sheer enthusiasm at the onset of each gear. The 2.0L driver should not rule out the GT3071R if his HP target is in the same range. The current-generation wheels, coupled with an awesome wheel ratio, allows even the smaller displacement engines to provide adequate flow to get the GT3071R going for an great powerband. This competition grade turbo still offers the best response and spool time out of any unit in this flow range.
2 uppipe gaskets will be needed if using the included spacer.
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