Quote Originally Posted by LRT View Post
HP Tuners initially charged extra credits (money) for the P01 / P59 COS upgrade, however since around June of 2014, the COS upgrade became free of charge.

A complete XDF (for TunerPro) for the 1Mb P59 PCM may be found here:

http://www.gearhead-efi.com/Fuel-Inj...ll=1#post73584

It is for 2004 P59 OS12587603 only.

Until you read the calibration that is in the PCM with tuning software, you will have no idea what Operating System (OS) is actually in use.
So if i have that os, it might be possible? I will look this afternoon and see what i have. Thank you for the info and link!