Today we released our own calibrations for the 2008 STi. If you already own an AccessPORT (part# AP-SUB-003), just download the firmware update and you’ll be ready to install. If you’ve driven a 2008 STi, you’ll know how much the car desperately needs a tune. The power delivery from the stock tune is choppy and inconsistent. With the our mapping, not only do you get more power but it’s SMOOTH and CONSISTENT. Exactly how it should of come from the factory.

Our mapping also retains the SI-Drive functionality. Many people are confused by exactly how SI-Drive works inside the ECU, but what it does NOT do is switch between three completely different maps/calibrations. All it ultimately does is change the throttle mapping. Intelligent is basically throttle cut in half. Sport is normal throttle mapping and Sport # is aggressive throttle mapping. Same fuel table, same ignition table, etc. We keep with that same functionality. We may change how it works in the future but for now, we’re using SI-Drive the same way Subaru designed it.

Here are the results:
To download the firmware update (AP-SUB-003 ONLY), click here.
To see what maps we have available for the 2008 STi, click here.
For ordering info, click here.