Originally Posted by OUScooby
Do you mean reflashed computer? No body makes "chips" for Subarus, that is to say no reputable companies make chips for Subarus. Any chip you buy for these cars will at best do nothing and at worst blow up you motor.
As for the compatibility of the ECUs otherwise, I don't know.
There are actual ROM chips for the earlier 20G and K ECU.
Rob on this forum makes them and they are very good.