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Old 09-28-2017, 11:17 PM   #1
Tim McCreary
Scooby Newbie
Member#: 348782
Join Date: Mar 2013
Default 2008 Impreza 2.5i in a 2006 Legacy 2.5i SE?

Can anyone give me some direction. I have a 2009 Impreza 2.5i drivetrain and was thinking of buying a 2006 Legacy with a blown motor with a good body nearby. I am assuming that the short block is interchangeable with no problems. The motor is toast and the heads may be bad.

My questions are:
Can I use the Impreza heads with the Legacy intake and ECU? I know they are different, but donít know the specifics. They are I-AVLS heads. Is there any sensors or wiring that needs done for the heads? I think the 2006 has I-AVLS heads from what I can find also.

Can I use the Impreza intake if I use the Impreza ECU? I assume this may not work with the legacy transmission. I wonder if the pinout on the plugs are the same.

Can I use the Impreza transmission using the ECU and AutoECU? What pitfalls will I run into?

Any help is appreciated.

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Old 09-28-2017, 11:21 PM   #2
NASIOC Supporter
Member#: 90539
Join Date: Jul 2005
Chapter/Region: South East
Location: Lake Charles
My BOV goes


I made a thread on how to use the 08-12? Legacy sohc engine in the 06-07 impreza sohc cars, may be the same thing as yours. I'd link it but the other times people have ignored so just search my threads.
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