I have a 99 BH Outback, 2.5l MT NA.
Wondering if there is any newer ECU (32bit flashable?) that would plug right in and work? Or did too much change before the 32bit ECUs came out?
I believe if you want to change the fuel management, or other system, you will need a stand alone aftermarket programmable system or a "piggy back" to tie in with the stock ECM.