Category Archives: 2008+ WRX STI

700whp+ Subaru Club – 2011 USDM STI 2.5 6MT

IAG stg 4 extreme block
14mm headstuds
Fire ring headgaskets
Pinned mains.
Garrett GTX3582R Gen 2
Ported heads, valves
Springs and Bc 280 cams
Ams intake manifold
TGV deleted

Full turbo back 3inch
Perrin big tube equal length headers
External wastgate 44mm
Grimmspeed 3Port boost controller

Injector dynamics 1700x
Radium in tank dual pumper
Dual AEM 340s Fuel Pumps
Perrin fuel rails regulator
PTFE line throughout
Radium -8 feed and return lines
Radium FPR 48psi base pressure

4bar map sensor -OMNI
Gm IAT sensor

Videos –

PaulH – 2011 JDM Subaru Impreza WRX STI A-Line 2.5 5EAT


Car feels amazing during pulls and can’t wait to get it on a nice stretch of road

The car is now feeling much better than I imagine, it moves and feels GREAT threw out the entire power-band, no more waiting till after 5000rpms to feel being pushed back in the seat. XRT is the best in customer service, turn around time and great advisor and tuner. Turn the car from slouchy to speedy


XRT Stage 2
XRT 5EAT Tuning
Zero Sports intake
Decatted downpipe
Zero Sports exhaust
Zero Sports pulley kit
Grimspeed EBC
Turbo Heat shield and blanket
Blouch 20G XTR (8cm) (47lb/min|480CHP)
ID 1050X
DW Fuel pump
TGV Deletes



RooseveltC – 2012/2013 JDM Subaru STI 2.0 6MT

Tyres: 245/40-18
Car Weight: 1477kg
Driver Weight: 104kg
Total Weight: 1581kg

Mods: Stock

Posted by Xtreme Racing Tuning on Sunday, January 28, 2018

2015+ WRX/STI: Remote Tuning Support

Image result for 2015 subaru wrx FA engines
XRT Remote Tuning Support for the 2015+ WRX/STI, through ECU Reflashing will be a new addition to our value added services, where customers who are looking for that X in Calibration, Response and Performance, can use us to fulfill their needs, knowing that we offer Precise Calibration and Superb Enhance Customer Service to accomplish their tuning needs and goals. We believe based on our accomplishments of 11yrs, we can achieve great results very quickly, safely and efficiently –
The addition of this new service will means that it will play very well into our aims; where over the years XRT have been developing its tuning strategies, for example, where persons using Cobb & EcuTek has made a switch to XRT and cannot believe how well the car works on stock boost. By doing so, we have put those others solutions to the test where those same solutions are running Stage 1 and 2 mappings. We just spend more timing Calibrating (Fine Tuning) and tremendous amount of logging and replaying logs in a format one can see issues and determine where, what, when and how a technique is applied. Many wonder how this is possible but the latter just shows you. We really care about real tuning (Calibrating) like a surgeon.
Once there strategies are applied, and especially on the FA platforms, we can expect to see the XRT Engine Response and Performance (XERP) increase tremendously in comparison to the competition. We do not follow or adhere to the general trend of tuning below. We believe in fully calibrating the Car for its environment, modifications and the owner’s needs.

2015+ Subaru WRX CVT Upgrade Path

XRT Recommendations: Modification Scheme for 350-400whp


Fuel System

Exhaust System

Intake System

Boost System

Oil Recommendations: Motul

CVT Transmission Cooler: Tru-Cool LPD