I got the urge to do some Googling this evening and got this list of Evo 8 ECU part numbers. I couldn't find a complete list of all them anywhere. If anyone has any additions, just add the to list.

MN132874 - 03 Evo 8 RS / GSR
MN132874 - 04 Evo 8 RS
MN191022 - 04 Evo 8 GSR

And the Ralliart ECUs, just for kicks - Source
RA191140R1 - High Octane fuel with no restrictor Evolution VIII MR / GSR
RA132750R1 - High Octane fuel with no restrictor Evolution VIII GSR
RA132751R1 - High Octane fuel with no restrictor Evolution VIII RS

Im guessing any of these would would to do the swap into a 2g?

James

They all should. I have MN132874 in my car.

How complicated to change the stock 2G ECU to Evo 8? Im a newbie btw.

Check out this thread for all the details:

https://www.dsmtuners.com/threads/evo-8-ecu-in-a-2g-your-visual-guide.347103/

It's not a direct swap there are several pins that are different in the harness and you either have to repin your factory harness or make a jumper harness to be able to use it.

Thank you so much for the link sir.