XPT Stage 1 - 2004 STI

This particular map is designed for the 2004 Subaru WRX STI with the following modifications:


-Stock IHI VF39 Turbo
-Stock STi Top Mount Intercooler
-Stock Downpipe - Catback or Axleback Exhaust is OK.
-Stock Boost Control Solenoid - No change in lines or T's.
-Stock Airbox with Hi-Flow Panel Filter (K&N, Perrin, etc..)


Further instructions will be provided upon receipt of your new map. This will include details and proper map break-in procedures/tips.


This map is designed to run at a peak of 17psi in 3rd gear, but is tuned up to 19psi for higher gears. It is not recommended to run any more than 19psi with low octane fuel. The A/F for this map runs 11's in the mid-range and 10.7 to 10.8 towards redline. It has been tuned on 91 octane California gas with up to 10% Ethanol. It will run even smoother on 93!