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09 FXT Stage 2 4EAT
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Yeah^^
You need at least a matching ECU to that engine for that swap to be successful or at least you need to be really good with wiring harnesses. It also looks like now you have AVACs to deal with. I don't remember if the 05 2.5xt had AVACs. I'd definitely buy a matching year STi ecu and start from there. But also since you have a AT that is going to throw a bunch of issues at you too. Good luck on this journey if you want to stay with this engine. Lots more research, research and research and your wife yelling at you to get off the computer.
 
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