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Old 05-16-2012, 10:53 AM   #53
Scooby Newbie
Member#: 79339
Join Date: Jan 2005
Chapter/Region: RMIC
Location: Westminster, CO
2002 EJ257 6spd WRX
Midnight Black


Originally Posted by padilla
We'll it happened. I spun a rod bearing and warranty won't cover it. So I have a plan to swap a 2011 sti(ej257) engine in my 2011 Wrx(ej255) one thing is will I need a Sti Ecu or can my wrx ecu work? Also what about the harness on the Sti engine, will it plug right in or will I need to do some modifications? That's all I need to know. Thank you.
I would assume since the STI has avcs on both intake and exhaust cams while the WRX only has it on one cam, that the wiring is different. The ecu probably will not plug right in either.

You could get service manuals for both cars on eBay and compare the schematics.
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