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View Full Version : 2.5l in a 99 Impreza, what ECU?


99Rally
03-11-2010, 12:25 PM
So I swapped a 2000 2.5l in to my 99 Impreza wagon, Started it up, and it seems to be running fine on the stock2.2l ECU. I havn't driven it yet though. I also have access to a 1999 2.5RS ECU, and i'm wondering....
1) Are the ECU's a direct swap?
2) What difference, (if any) will putting in the 2.5RS ECU make?
Thanks.